18 results on '"Érica Munhoz de Mello"'
Search Results
2. Ecological drivers of sustained enzootic yellow fever virus transmission in Brazil, 2017-2021.
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Natália Ingrid Oliveira Silva, Gregory F Albery, Matheus Soares Arruda, Gabriela Fernanda Garcia Oliveira, Thaís Alkifeles Costa, Érica Munhoz de Mello, Gabriel Dias Moreira, Erik Vinícius Reis, Simone Agostinho da Silva, Marlise Costa Silva, Munique Guimarães de Almeida, Daniel J Becker, Colin J Carlson, Nikos Vasilakis, Kathryn A Hanley, and Betânia Paiva Drumond
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Arctic medicine. Tropical medicine ,RC955-962 ,Public aspects of medicine ,RA1-1270 - Abstract
Beginning December 2016, sylvatic yellow fever (YF) outbreaks spread into southeastern Brazil, and Minas Gerais state experienced two sylvatic YF waves (2017 and 2018). Following these massive YF waves, we screened 187 free-living non-human primate (NHPs) carcasses collected throughout the state between January 2019 and June 2021 for YF virus (YFV) using RTqPCR. One sample belonging to a Callithrix, collected in June 2020, was positive for YFV. The viral strain belonged to the same lineage associated with 2017-2018 outbreaks, showing the continued enzootic circulation of YFV in the state. Next, using data from 781 NHPs carcasses collected in 2017-18, we used generalized additive mixed models (GAMMs) to identify the spatiotemporal and host-level drivers of YFV infection and intensity (an estimation of genomic viral load in the liver of infected NHP). Our GAMMs explained 65% and 68% of variation in virus infection and intensity, respectively, and uncovered strong temporal and spatial patterns for YFV infection and intensity. NHP infection was higher in the eastern part of Minas Gerais state, where 2017-2018 outbreaks affecting humans and NHPs were concentrated. The odds of YFV infection were significantly lower in NHPs from urban areas than from urban-rural or rural areas, while infection intensity was significantly lower in NHPs from urban areas or the urban-rural interface relative to rural areas. Both YFV infection and intensity were higher during the warm/rainy season compared to the cold/dry season. The higher YFV intensity in NHPs in warm/rainy periods could be a result of higher exposure to vectors and/or higher virus titers in vectors during this time resulting in the delivery of a higher virus dose and higher viral replication levels within NHPs. Further studies are needed to better test this hypothesis and further compare the dynamics of YFV enzootic cycles between different seasons.
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- 2023
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3. YELLOW ALERT: Persistent Yellow Fever Virus Circulation among Non-Human Primates in Urban Areas of Minas Gerais State, Brazil (2021–2023)
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Gabriela F. Garcia-Oliveira, Anna Catarina Dias Soares Guimarães, Gabriel Dias Moreira, Thais Alkifeles Costa, Matheus Soares Arruda, Érica Munhoz de Mello, Marlise Costa Silva, Munique Guimarães de Almeida, Kathryn A. Hanley, Nikos Vasilakis, and Betânia Paiva Drumond
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Brazil ,yellow fever ,yellow fever virus ,epizootics ,outbreaks ,non-human primate ,Microbiology ,QR1-502 - Abstract
Yellow fever virus (YFV) is the agent of yellow fever (YF), which affects both humans and non-human primates (NHP). Neotropical NHP are highly susceptible to YFV and considered sentinels for YFV circulation. Brazil faced a significant YF outbreak in 2017–2018, with over 2000 human cases and 2000 epizootics cases, mainly in the State of Minas Gerais, Brazil. This study aimed to investigate whether YFV circulation persisted in NHP after the human outbreak had subsided. To this end, NHP carcass samples collected in Minas Gerais from 2021 to 2023 were screened for YFV. RNA was extracted from tissue fragments and used in RT-qPCR targeting the YFV 5’UTR. Liver and lung samples from 166 animals were tested, and the detection of the β-actin mRNA was used to ensure adequacy of RNA isolation. YFV RNA was detected in the liver of 18 NHP carcasses collected mainly from urban areas in 2021 and 2022. YFV positive NHP were mostly represented by Callithrix, from 5 out of the 12 grouped municipalities (mesoregions) in Minas Gerais state. These findings reveal the continued YFV circulation in NHP in urban areas of Minas Gerais during 2021 and 2022, with the attendant risk of re-establishing the urban YFV cycle.
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- 2023
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4. Neighbor danger: Yellow fever virus epizootics in urban and urban-rural transition areas of Minas Gerais state, during 2017-2018 yellow fever outbreaks in Brazil.
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Lívia Sacchetto, Natalia Ingrid Oliveira Silva, Izabela Maurício de Rezende, Matheus Soares Arruda, Thais Alkifeles Costa, Érica Munhoz de Mello, Gabriela Fernanda Garcia Oliveira, Pedro Augusto Alves, Vítor Emídio de Mendonça, Rodolfo German Antonelli Vidal Stumpp, Alaine Izabela Alves Prado, Adriano Pereira Paglia, Fernando Araújo Perini, Maurício Lacerda Nogueira, Erna Geessien Kroon, Benoit de Thoisy, Giliane de Souza Trindade, and Betânia Paiva Drumond
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Arctic medicine. Tropical medicine ,RC955-962 ,Public aspects of medicine ,RA1-1270 - Abstract
BackgroundFrom the end of 2016 until the beginning of 2019, Brazil faced a massive sylvatic yellow fever (YF) outbreak. The 2016-2019 YF epidemics affected densely populated areas, especially the Southeast region, causing thousands of deaths of humans and non-human primates (NHP).Methodology/principal findingsWe conducted a molecular investigation of yellow fever virus (YFV) RNA in 781 NHP carcasses collected in the urban, urban-rural interface, and rural areas of Minas Gerais state, from January 2017 to December 2018. Samples were analyzed according to the period of sampling, NHP genera, sampling areas, and sampling areas/NHP genera to compare the proportions of YFV-positive carcasses and the estimated YFV genomic loads. YFV infection was confirmed in 38.1% of NHP carcasses (including specimens of the genera Alouatta, Callicebus, Callithrix, and Sapajus), from the urban, urban-rural interface, and rural areas. YFV RNA detection was positively associated with epidemic periods (especially from December to March) and the rural environment. Higher median viral genomic loads (one million times) were estimated in carcasses collected in rural areas compared to urban ones.Conclusions/significanceThe results showed the wide occurrence of YF in Minas Gerais in epidemic and non-epidemic periods. According to the sylvatic pattern of YF, a gradient of viral dissemination from rural towards urban areas was observed. A high YF positivity was observed for NHP carcasses collected in urban areas with a widespread occurrence in 67 municipalities of Minas Gerais, including large urban centers. Although there was no documented case of urban/Aedes YFV transmission to humans in Brazil during the 2016-2019 outbreaks, YFV-infected NHP in urban areas with high infestation by Aedes aegypti poses risks for YFV urban/Aedes transmission and urbanization.
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- 2020
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5. Persistence of Yellow fever virus outside the Amazon Basin, causing epidemics in Southeast Brazil, from 2016 to 2018.
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Izabela Maurício de Rezende, Lívia Sacchetto, Érica Munhoz de Mello, Pedro Augusto Alves, Felipe Campos de Melo Iani, Talita Émile Ribeiro Adelino, Myrian Morato Duarte, Ana Luísa Furtado Cury, André Felipe Leal Bernardes, Tayrine Araújo Santos, Leonardo Soares Pereira, Maria Rita Teixeira Dutra, Dario Brock Ramalho, Benoit de Thoisy, Erna Geessien Kroon, Giliane de Souza Trindade, and Betânia Paiva Drumond
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Arctic medicine. Tropical medicine ,RC955-962 ,Public aspects of medicine ,RA1-1270 - Abstract
Yellow fever (YF) is endemic in the Brazilian Amazon Basin, and sporadic outbreaks take place outside the endemic area in Brazil. Since 2016, YF epidemics have been occurring in Southeast Brazil, with more than 1,900 human cases and more than 1,600 epizooties of non-human primates (NHPs) reported until April 2018. Previous studies have demonstrated that Yellow fever virus (YFV) causing outbreaks in 2017 formed a monophyletic group.Aiming to decipher the origin of the YFV responsible for the recent epidemics, we obtained nucleotide sequences of YFV detected in humans (n = 6) and NHPs (n = 10) from Minas Gerais state during 2017-2018. Next, we performed evolutionary analyses and discussed the results in the light of epidemiological records (official numbers of YFV cases at each Brazilian Federative unit, reported by the Brazilian Ministry of Health). Nucleotide sequences of YFV from Southeast Brazil from 2016 to 2018 were highly conserved and formed a monophyletic lineage (BR-YFV_2016/18) within the genotype South America I. Different clusters were observed within lineage BR-YFV_2016/18, one containing the majority of isolates (from humans and NHPs), indicating the sylvatic transmission of YFV. We also detected a cluster characterized by two synapomorphies (amino acid substitutions) that contained YFV only associated with NHP what should be further investigated. The topology of lineage BR-YFV_2016/18 was congruent with epidemiological and temporal patterns of the ongoing epidemic. YFV isolates detected in 2016, in São Paulo state were located in the most basal position of the lineage, followed by the isolates from Minas Gerais and Espírito Santo obtained in 2017 and 2018. The most recent common ancestor of the lineage BR-YFV_2016/18 dated to 2015 (95% credible intervals = 2014-2016), in a period that was coincident with the reemergence of YFV in the Midwest region of Brazil.The results demonstrated a single introduction of YFV in the Southeast region and the silent viral circulation before the onset of the outbreaks in 2016. Evolutionary analyses combined with epidemiological records supported the idea that BR-YFV_2016/18 was probably introduced from the Midwest into the Southeast region, possibly in São Paulo state. The persistence of YFV in the Southeast region, causing epidemics from 2016 to 2018, suggests that this region presents suitable ecological and climatic conditions for YFV maintenance during the epidemic and interepidemic seasons. This fact poses risks for the establishing of YF enzootic cycles and epidemics, outside the Amazon Basin in Brazil. YF surveillance and studies of viral dynamics deserve particular attention, especially in Midwest, Southeast and neighbor regions which are the main areas historically associated with YF outbreaks outside the Amazon Basin. YFV persistence in Southeast Brazil should be carefully considered in the context of public health, especially for public health decision-makers and researchers.
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- 2018
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6. Global response of conservationists across mass media likely constrained bat persecution due to COVID-19
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Veronica Nanni, Stefano Mammola, Nuria Macías-Hernández, Alessia Castrogiovanni, Ana L. Salgado, Enrico Lunghi, Gentile Francesco Ficetola, Corrado Modica, Riccardo Alba, Maria Michela Spiriti, Susanne Holtze, Érica Munhoz de Mello, Barbara De Mori, Pierfrancesco Biasetti, Dan Chamberlain, and Raoul Manenti
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Risk perception ,SARS-CoV-2 ,Communication ,Bats ,Conservation ,Mass media ,Settore BIO/05 - Zoologia ,Ecology, Evolution, Behavior and Systematics ,Nature and Landscape Conservation - Abstract
Most people lack direct experience with wildlife and form their risk perception primarily on information provided by the media. The way the media frames news may substantially shape public risk perception, promoting or discouraging public tolerance towards wildlife. At the onset of the COVID-19 pandemic, bats were suggested as the most plausible reservoir of the virus, and this became a recurrent topic in media reports, potentially strengthening a negative view of this ecologically important group. We investigated how media framed bats and bat-associated diseases before and during the COVID-19 pandemic by assessing the content of 2651 online reports published across 26 countries, to understand how and how quickly worldwide media may have affected the perception of bats. We show that the overabundance of poorly contextualized reports on bat-associated diseases likely increased the persecution towards bats immediately after the COVID-19 outbreak. However, the subsequent interventions of different conservation communication initiatives allowed pro-conservation messages to resonate across the global media, likely stemming an increase in bat persecution. Our results highlight the modus operandi of the global media regarding topical biodiversity issues, which has broad implications for species conservation. Knowing how the media acts is pivotal for anticipating the propagation of (mis)information and negative feelings towards wildlife. Working together with journalists by engaging in dialogue and exchanging experiences should be central in future conservation management.
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- 2022
7. Bats as hosts of Leishmania (Leishmania) infantum in Minas Gerais, an endemic area for visceral leishmaniasis
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Giovanna Rotondo, de Araújo, Érica Munhoz, de Mello, Valéria Nayara Gomes Mendes, de Oliveira, Talita Rodrigues, Dos Santos, Ramon Vieira, Nunes, Hélida Monteiro, de Andrade, Luis Fernando Viana, Furtado, and Élida Mara Leite, Rabelo
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General Veterinary ,Chiroptera ,Animals ,Leishmaniasis, Visceral ,Parasitology ,Leishmania infantum ,Leishmaniasis ,Brazil - Abstract
Bats are parasitized by a wide spectrum of ecto and endoparasites, but their role as a reservoir for some zoonoses is not fully understood. The objective of this work was to evaluate the presence of Leishmania DNA in the blood of bats from 30 municipalities in the state of Minas Gerais, Brazil. We analyzed samples of 120 bats, covering 29 species. The blood samples were used for DNA extraction and submitted to conventional PCR analysis with primers directed to the Leishmania ITS-1 region of the rRNA. In total, 1.67% (2/120 samples) were positive for Leishmania spp., detected in animals from the metropolitan region of Belo Horizonte, the state capital. Sequencing of the positive samples revealed that both bats were infected with Leishmania (Leishmania) infantum. Considering the adaptability of some bats species to synanthropic environments, the results of the present work can contribute to a better comprehension of the leishmaniasis cycle and epidemiology.
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- 2022
8. First Case Report of Mange in Molossus molossus (Chiroptera: Molossidae) Caused by Notoedres (Notoedres) yunkeri (Sarcoptiformes: Sarcoptidae) in Minas Gerais State, Brazil
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Matheus Huang-Bastos, Ricardo Bassini-Silva, Darci Moraes Barros-Battesti, Barry M. OConnor, Érica Munhoz de Mello, Fernando de Castro Jacinavicius, Instituto Butantan, Universidade de São Paulo (USP), Centro de Controle de Zoonoses, University of Michigan, and Universidade Estadual Paulista (Unesp)
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Male ,Nymph ,Mite Infestations ,Notoedric mange ,030231 tropical medicine ,Mange ,FAMILY SARCOPTIDAE ,Zoology ,Molossus molossus ,Sarcoptidae ,030308 mycology & parasitology ,03 medical and health sciences ,0302 clinical medicine ,Chiroptera ,medicine ,Animals ,notoedric mange ,Neotropical region ,Molossidae ,mange mite ,0303 health sciences ,Panama ,General Veterinary ,biology ,biology.organism_classification ,medicine.disease ,Sarcoptiformes ,Infectious Diseases ,Larva ,Insect Science ,Female ,Parasitology ,Brazil - Abstract
Made available in DSpace on 2021-06-25T11:01:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-05-01 There are many records of the family Sarcoptidae in bats. The species Notoedres (Notoedres) yunkeri has been reported only once, parasitizing a molossid bat in Panama. In the present study, we expand the occurrence of the species to Brazil. Laboratório Especial de Coleções Zoológicas Instituto Butantan Departamento de Medicina Veterinária Preventiva e Saúde Animal Faculdade de Medicina Veterinária e Zootecnia - FMVZ Universidade de São Paulo - USP Laboratório de Morcegos Urbanos Centro de Controle de Zoonoses Department of Ecology and Evolutionary Biology Museum of Zoology University of Michigan Departamento de Patologia Reprodução e Saúde Única Faculdade de Ciências Agrárias e Veterinárias-UNESP Departamento de Patologia Reprodução e Saúde Única Faculdade de Ciências Agrárias e Veterinárias-UNESP
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- 2021
9. NUEVO REGISTRO DE HISTIOSTRONGYLUS CORONATUS (NEMATODA, MOLINEIDAE) PARASITANDO MURCIÉLAGOS (MAMMALIA, CHIROPTERA) EN BRASIL
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Reinaldo José da Silva and Érica Munhoz de Mello
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Helminto ,Trichostrongyloidea ,Taxonomia ,General Medicine ,Parasito ,Minas Gerais ,Biology ,Humanities ,Trato gastrointestinal - Abstract
Registramos Histiostrongylus coronatus Molin, 1861 no intestino delgado de Phyllostomus discolor Wagner, 1843 (Phyllostomidae). O helminto foi descrito baseado apenas em uma fêmea adulta, porém esta apresentou caraterísticas morfológicas compatíveis com descrições prévias da espécie. O presente trabalho amplia a ocorrência geográfica do parasito para o Estado de Minas Gerais e constitui o segundo relato da espécie do helminto no Brasil.
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- 2020
10. MARACAYA BELEMENSIS ADAMSON & BACCAM, 1988 (ATRACTIDAE, ASCARIDIDA) PARASITANDO UMA CROTALUS DURISSUS LINNAEUS, 1758 (SERPENTES, VIPERIDAE) NO BRASIL
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Reinaldo José da Silva and Érica Munhoz de Mello
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Nematodo ,Enfermedad de reptiles ,Helminths ,Zoology ,Crotalus durissus ,Infección ectópica ,General Medicine ,Biology ,Maracaya belemensis - Abstract
Maracaya Díaz-Ungría, 1964 es un género poco conocido de nematodo en anfibios. En este estudio se describe una serpiente de cascabel Crotalus durissus Linnaeus, 1758 parasitada por dos especímenes de Maracaya belemensis Adamson & Baccam, 1988 en el sureste de Brasil. El presente estudio registra un nuevo hospedero y amplía la distribución geográfica de este nematodo.
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- 2020
11. NEW RECORDS OF CAPILLARIIDAE SPECIES (NEMATODA, ENOPLIDA) PARASITING BATS (MAMMALIA, CHIROPTERA) IN BRAZIL
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Érica Munhoz de Mello and Reinaldo José da Silva
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Capillariidae ,biology ,bats ,Enoplida ,Helminths ,Aonchotheca ,Zoology ,capillarids ,mammals ,Tenoranema ,General Medicine ,biology.organism_classification - Abstract
During a helminthological survey on bats from Minas Gerais state, Brazil, we found 3.13% of bats parasitized with capillarids. Aonchotheca pulchra (Freitas, 1934), Tenoranema rivarolai (Lent et al., 1946), and some specimens of capillarids non-identified were registered. This is the first report of A. pulchra in Minas Gerais state and the second report of T. rivarolai in South America.
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- 2020
12. DNA barcoding of metacestodes found in the Guerlinguetus ingrami (Rodentia: Sciuridae) reveals the occurrence of Hydatigera taeniaeformis sensu stricto (Cyclophyllidea: Taeniidae) in the Americas
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Érica Munhoz de Mello, Hudson Alves Pinto, Luis Fernando Viana Furtado, and Élida Mara Leite Rabelo
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0301 basic medicine ,Species complex ,Cestoda ,Zoology ,Biology ,DNA barcoding ,03 medical and health sciences ,Genus ,Animals ,DNA Barcoding, Taxonomic ,Parasite hosting ,Taeniasis ,Taenia ,Phylogenetic tree ,Sciuridae ,030108 mycology & parasitology ,biology.organism_classification ,030104 developmental biology ,Infectious Diseases ,Liver ,Taeniidae ,Parasitology ,Americas ,Cyclophyllidea ,Brazil - Abstract
The existence of cryptic species in the genus Hydatigera, cyclophillid cestodes, mainly of felids, was recently described based on molecular studies of parasites from Asia, Europe and Africa. However, the occurrence of H. taeniaeformis sensu stricto (s.s.), the species more widely distributed and with a presumed specificity for murid rodents as intermediate hosts, has not been formally described in Americas. In the present study, during necropsy of an Ingram's squirrel specimen, Guerlinguetus ingrami, found dead in the municipality of Belo Horizonte, Minas Gerais state, Brazil, strobilocerci were found in the liver. The metacestodes were subjected to morphological and molecular studies. Sequences of the COI barcode region were obtained and used for phylogenetic analyses. The morphology and measures of the rostellar hooks were compatible with the ones described for H. taeniaeformis s.s. This identification was confirmed by a molecular phylogenetic approach (96.2-99.7% similarity with isolates of the parasite from Europe and Asia). This is the first molecular confirmation of the existence of H. taeniaeformis s.s. on the American continent. Moreover, the involvement of sciurid rodents in the transmission of H. taeniaeformis s.s. is discussed here as a probable case of parasite spillover.
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- 2018
13. Urotrema macrotestis and Urotrema scabridum (Digenea: Urotrematidae) parasitizing bats (Mammalia: Chiroptera) in Brazil
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Érica Munhoz de Mello, Reinaldo José da Silva, Élida Mara Leite Rabelo, Universidade Federal de Minas Gerais (UFMG), Municipality Secretary of Health of Belo Horizonte, and Universidade Estadual Paulista (Unesp)
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Multidisciplinary ,biology ,Zoology ,Trematode Infections ,biology.organism_classification ,infection ,Digenea ,Host-Parasite Interactions ,Eumops glaucinus ,Chiroptera ,Animals ,lcsh:Q ,Taxonomy (biology) ,Trematoda ,Urotrema scabridum ,lcsh:Science ,Animal Distribution ,Brazil ,Taxonomy - Abstract
Made available in DSpace on 2019-10-06T15:38:57Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-01. Added 1 bitstream(s) on 2021-07-15T14:35:32Z : No. of bitstreams: 1 S0001-37652019000100616.pdf: 1663784 bytes, checksum: 6bc7f23d512c50a2be683eb226599c6d (MD5) Urotrema scabridum Braun 1900 and Urotrema macrotestis Mané-Garzón and Telias 1965 are reported from the small intestine of Eumops glaucinus (Wagner, 1843). The species were differentiated by the body width, the size and position of acetabulum, the size of testis, the caecal termination, and the distribution of vitellarium. The present study expands the distribution and the hosts of both species in Minas Gerais State and reports U. macrotestis parasitizing bats for the first time. Molecular Helminthology Laboratory Department of Parasitology Institute of Biological Sciences Federal University of Minas Gerais/UFMG, Avenida Antônio Carlos, 6627 Urban Bats Laboratory Zoonosis Control Center Municipality Secretary of Health of Belo Horizonte, Rua Edna Quintel, 173 São Paulo State University/UNESP Institute of Bioscience, Rua Professor Doutor Antônio Celso Wagner Zanin, s/n São Paulo State University/UNESP Institute of Bioscience, Rua Professor Doutor Antônio Celso Wagner Zanin, s/n
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- 2019
14. Neighbor danger: Yellow fever virus epizootics in urban and urban-rural transition areas of Minas Gerais state, during 2017-2018 yellow fever outbreaks in Brazil
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Matheus Soares Arruda, Adriano Pereira Paglia, Rodolfo Stumpp, Lívia Sacchetto, Natalia Ingrid Oliveira Silva, Thais Alkifeles Costa, Erna Geessien Kroon, Betânia Paiva Drumond, Gabriela Fernanda Garcia Oliveira, Alaine Izabela Alves Prado, Pedro Augusto Alves, Érica Munhoz de Mello, Fernando A. Perini, Izabela Maurício de Rezende, Giliane de Souza Trindade, Maurício Lacerda Nogueira, Vítor Emídio de Mendonça, and Benoit de Thoisy
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RNA viruses ,Veterinary medicine ,RC955-962 ,Social Sciences ,Monkeys ,Pathology and Laboratory Medicine ,medicine.disease_cause ,Callicebus ,Geographical locations ,law.invention ,Urban Environments ,Aedes ,law ,Arctic medicine. Tropical medicine ,Zoonoses ,Medicine and Health Sciences ,Alouatta ,Geographic Areas ,Mammals ,Mammalian Genomics ,Geography ,biology ,Yellow fever ,Eukaryota ,Callithrix ,Animal Models ,Genomics ,Terrestrial Environments ,Infectious Diseases ,Transmission (mechanics) ,Experimental Organism Systems ,Medical Microbiology ,Sapajus ,Viral Pathogens ,Viruses ,Vertebrates ,Public aspects of medicine ,RA1-1270 ,Yellow fever virus ,Pathogens ,Brazil ,Research Article ,Urban Areas ,Primates ,Genome, Viral ,Mosquito Vectors ,Aedes aegypti ,Human Geography ,Research and Analysis Methods ,Microbiology ,Urban Geography ,Urbanization ,Yellow Fever ,Infestation ,Genetics ,medicine ,Animals ,Humans ,Epidemics ,Microbial Pathogens ,Disease Reservoirs ,New World monkeys ,Biology and life sciences ,Flaviviruses ,Ecology and Environmental Sciences ,Organisms ,Public Health, Environmental and Occupational Health ,Outbreak ,South America ,biology.organism_classification ,medicine.disease ,Rural Areas ,Animal Genomics ,Amniotes ,Earth Sciences ,Animal Studies ,People and places ,Marmosets ,Rural area ,Zoology - Abstract
Background From the end of 2016 until the beginning of 2019, Brazil faced a massive sylvatic yellow fever (YF) outbreak. The 2016–2019 YF epidemics affected densely populated areas, especially the Southeast region, causing thousands of deaths of humans and non-human primates (NHP). Methodology/Principal findings We conducted a molecular investigation of yellow fever virus (YFV) RNA in 781 NHP carcasses collected in the urban, urban-rural interface, and rural areas of Minas Gerais state, from January 2017 to December 2018. Samples were analyzed according to the period of sampling, NHP genera, sampling areas, and sampling areas/NHP genera to compare the proportions of YFV-positive carcasses and the estimated YFV genomic loads. YFV infection was confirmed in 38.1% of NHP carcasses (including specimens of the genera Alouatta, Callicebus, Callithrix, and Sapajus), from the urban, urban-rural interface, and rural areas. YFV RNA detection was positively associated with epidemic periods (especially from December to March) and the rural environment. Higher median viral genomic loads (one million times) were estimated in carcasses collected in rural areas compared to urban ones. Conclusions/Significance The results showed the wide occurrence of YF in Minas Gerais in epidemic and non-epidemic periods. According to the sylvatic pattern of YF, a gradient of viral dissemination from rural towards urban areas was observed. A high YF positivity was observed for NHP carcasses collected in urban areas with a widespread occurrence in 67 municipalities of Minas Gerais, including large urban centers. Although there was no documented case of urban/Aedes YFV transmission to humans in Brazil during the 2016–2019 outbreaks, YFV-infected NHP in urban areas with high infestation by Aedes aegypti poses risks for YFV urban/Aedes transmission and urbanization., Author summary Brazil faced the most massive sylvatic yellow fever (YF) outbreak in 2016–2019. The outbreak affected highly densely populated areas, and Minas Gerais was the most affected state with thousands of deaths of human and non-human primates (NHP). We investigated the yellow fever virus (YFV) RNA in NHP carcasses collected throughout Minas Gerais in 2017 and 2018. We demonstrated the wide occurrence of YFV-infected NHP, including the viral persistence during the non-epidemic dry season of 2017. YFV RNA was detected in NHP carcasses in the urban, urban-rural interface and rural areas. We have also detected new YF cases in 49 municipalities where YF cases have not been previously detected during the outbreaks. Estimates of YFV genomic load in naturally infected NHP carcasses showed high and similar loads in specimens (Alouatta, Callithrix, and Callicebus) collected in rural areas and lower genomic loads in the urban-rural interface and urban Callithrix specimens. The presence of YFV inside urban areas poses an imminent risk, although no human case was epidemiologically linked to urban/Aedes transmission during the last outbreaks in Brazil.
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- 2020
15. Genomic and epidemiological monitoring of yellow fever virus transmission potential
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Marcos Cesar Lima de Mendonça, Maira Alves Pereira, Mariana Sequetin Cunha, Mariane Talon de Menezes, Ester Cerdeira Sabino, Deise Aparecida dos Santos, Giliane de Souza Trindade, Juliana Silva Nogueira, Felipe Campos de Melo Iani, Rodrigo Dias de Oliveira Carvalho, Guy Baele, Erna Geessien Kroon, Talita Émile Ribeiro Adelino, Alexandre Otavio Chieppe, Betânia Paiva Drumond, Simon Dellicour, Maria Angelica Mares Guia, Nuno R. Faria, Kuiama Lewandowski, Izabela Maurício de Rezende, Ludmila Ferraz de Santana, William Wint, Ricardo Gadelha de Abreu, Julien Thézé, André Luis de Abreu, Jaqueline Goes de Jesus, Tetyana I. Vasylyeva, Vagner Fonseca, Shirley Vasconcelos Komninakis, Marcos Vieira Silva, Carlos Frederico Campelo de Albuquerque, Renato S. Aguiar, Miles W. Carroll, Sarah C. Hill, Freya M Shearer, Paola P. Silveira, D. Yi, Moritz U. G. Kraemer, Luiz Carlos Junior Alcantara, Joshua Quick, Vasco Azevedo, L. du Plessis, Érica Munhoz de Mello, T. de Oliveira, Philippe Lemey, Carolina Cardoso dos Santos, Daniel J. Weiss, José Lourenço, Leandro Abade, Patrícia Carvalho de Sequeira, Oliver G. Pybus, Lívia Sacchetto, Rita Maria Ribeiro Nogueira, Osnei Okumoto, Rodrigo Fabiano do Carmo Said, Monica B. Arruda, Ana Maria Bispo de Filippis, Poliana de Oliveira Figueiredo, Uri Obolski, Iray Maria Rocco, Chieh-Hsi Wu, Eliane Saraiva Machado de Araújo, Rodrigo Brindeiro, Renato Pereira de Souza, Birgit Nikolay, Marta Giovanetti, Simon Cauchemez, Nicholas J. Loman, Mariana Gontijo de Brito, Sebastian Funk, Steven T. Pullan, Cintia Damasceno dos Santos Rodrigues, Joilson Xavier, Gavin Pereira, A. C. da Costa, Marcio Henrique de Oliveira Garcia, Amilcar Tanuri, Marc A. Suchard, Fabiana Cristina Pereira dos Santos, Marcela Lencine Ferraz, Marluce Aparecida Assunção Oliveira, University of Oxford, Laboratório de Biologia Molecular de Flavivírus [Rio de Janeiro], Instituto Oswaldo Cruz / Oswaldo Cruz Institute [Rio de Janeiro] (IOC), Fundação Oswaldo Cruz / Oswaldo Cruz Foundation (FIOCRUZ), Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Fundação Oswaldo Cruz / Oswaldo Cruz Foundation (FIOCRUZ), Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP), Universidade Federal do Rio de Janeiro (UFRJ), Rega Institute for Medical Research [Leuven, België], Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), London School of Hygiene and Tropical Medicine (LSHTM), Modélisation mathématique des maladies infectieuses - Mathematical modelling of Infectious Diseases, Institut Pasteur [Paris] (IP)-Centre National de la Recherche Scientifique (CNRS), Centre de Bioinformatique, Biostatistique et Biologie Intégrative (C3BI), Universidade Federal de Minas Gerais [Belo Horizonte] (UFMG), University of Oxford [Oxford], Fundação Oswaldo Cruz (FIOCRUZ), Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Fundação Oswaldo Cruz (FIOCRUZ), and Institut Pasteur [Paris]-Centre National de la Recherche Scientifique (CNRS)
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0301 basic medicine ,Virus transmission ,Spatial expansion ,[SDV]Life Sciences [q-bio] ,Polymerase Chain Reaction ,law.invention ,Disease Outbreaks ,0302 clinical medicine ,law ,Aedes ,2.2 Factors relating to the physical environment ,Aetiology ,Phylogeny ,Multidisciplinary ,Yellow fever ,Age Factors ,Genomics ,Sciences bio-médicales et agricoles ,3. Good health ,Transmission (mechanics) ,Infectious Diseases ,Epidemiological Monitoring ,Yellow fever virus ,Early phase ,Infection ,Brazil ,Risk ,Evolution ,General Science & Technology ,030231 tropical medicine ,Biology ,Age and sex ,Vaccine Related ,Evolution, Molecular ,03 medical and health sciences ,Rare Diseases ,Sex Factors ,Spatio-Temporal Analysis ,Biodefense ,Yellow Fever ,medicine ,Genetics ,Animals ,Humans ,Prevention ,Molecular ,biology.organism_classification ,medicine.disease ,Virology ,030104 developmental biology ,Emerging Infectious Diseases ,BRASIL - Abstract
The yellow fever virus (YFV) epidemic in Brazil is the largest in decades. The recent discovery of YFV in Brazilian Aedes species mosquitos highlights a need to monitor the risk of reestablishment of urban YFV transmission in the Americas. We use a suite of epidemiological, spatial, and genomic approaches to characterize YFV transmission. We show that the age and sex distribution of human cases is characteristic of sylvatic transmission. Analysis of YFV cases combined with genomes generated locally reveals an early phase of sylvatic YFV transmission and spatial expansion toward previously YFV-free areas, followed by a rise in viral spillover to humans in late 2016. Our results establish a framework for monitoring YFV transmission in real time that will contribute to a global strategy to eliminate future YFV epidemics., info:eu-repo/semantics/published
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- 2018
16. Evidence of natural Zika virus infection in neotropical non-human primates in Brazil
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Cíntia Bittar, João Pessoa Araújo, Izalco Nuremberg Penha dos Santos, Nikos Vasilakis, Lívia Sacchetto, Rafael Alves da Silva, Andréia Cristina Marascalchi Ferreira, Mariana Sequetin Cunha, Vivian Vasconcelos Costa, Jéssica Rayra, Felipe Coutinho, Izabela Maurício de Rezende, Nathalia Zini, Paula Rahal, Maurício Lacerda Nogueira, Giliane de Souza Trindade, Josué Díaz-Delgado, Ana Carolina Fialho Dias, José Luiz Catão-Dias, Carolina Colombelli Pacca, Maisa Carla Pereira Parra, Leila Sabrina Ullmann, Ana Carolina Bernardes Terzian, Francisco Chiaravalloti-Neto, Natália Coelho Couto de Azevedo Fernandes, Rebeca Rocha, Érica Munhoz de Mello, Betânia Paiva Drumond, Juliana L. Del Sarto, Andréia Francesli Negri Reis, Lilian Cruz, Rodrigo Albergaria Réssio, Steven G. Widen, Erna Geessien Kroon, Juliana Mariotti Guerra, Mauro M. Teixeira, Camila Dantas Malossi, CEP: 15090-000, Universidade Federal de Minas Gerais (UFMG), Pacaembú, Universidade de São Paulo (USP), Universidade Estadual Paulista (Unesp), Vila Sinibaldi, 301 University Blvd, São Bernardo, and Jardim Francisco Fernandes
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0301 basic medicine ,Primates ,Old World ,lcsh:Medicine ,Viremia ,Article ,Zika virus ,03 medical and health sciences ,Aedes ,medicine ,Animals ,Humans ,lcsh:Science ,Phylogeny ,Disease Reservoirs ,2. Zero hunger ,Multidisciplinary ,biology ,Transmission (medicine) ,Viral Epidemiology ,Zika Virus Infection ,lcsh:R ,Zika Virus ,biology.organism_classification ,medicine.disease ,Virology ,3. Good health ,030104 developmental biology ,ZIKA VÍRUS ,Africa ,Enzootic ,Non-human ,Sylvatic cycle ,lcsh:Q ,Brazil - Abstract
Made available in DSpace on 2019-10-06T16:02:52Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-12-01 National Institutes of Health In Africa, Old World Primates are involved in the maintenance of sylvatic circulation of ZIKV. However, in Brazil, the hosts for the sylvatic cycle remain unknown. We hypothesized that free-living NHPs might play a role in urban/periurban ZIKV dynamics, thus we undertook an NHP ZIKV investigation in two cities in Brazil. We identified ZIKV-positive NHPs and sequences obtained were phylogenetically related to the American lineage of ZIKV. Additionally, we inoculated four C. penicillata with ZIKV and our results demonstrated that marmosets had a sustained viremia. The natural and experimental infection of NHPs with ZIKV, support the hypothesis that NHPs may be a vertebrate host in the maintainance of ZIKV transmission/circulation in urban tropical settings. Further studies are needed to understand the role they may play in maintaining the urban cycle of the ZIKV and how they may be a conduit in establishing an enzootic transmission cycle in tropical Latin America. São José do Rio Preto School of Medicine (FAMERP) Avenida Brigadeiro Faria Lima 5416 CEP: 15090-000, Vila São Pedro Laboratório de Vírus - Universidade Federal de Minas Gerais (UFMG) Avenida Antônio Carlos 6627 CEP: 31270-901 Pampulha Center for Drug Research and Development Instituto de Ciências Biológicas Universidade Federal de Minas Gerais (UFMG) Avenida Antônio Carlos 6627 CEP: 31270-901 Pampulha Instituto Adolfo Lutz (IAL) Avenida Dr. Arnaldo 351 − 7 Andar Sala 706 CEP: 01246-000 Pacaembú Laboratory of Wildlife Comparative Pathology Department of Pathology School of Veterinary Medicine and Animal Sciences University of São Paulo (LAPOCM-FMVZ-USP) Avenida Orlando Marques de Paiva 87 CEP: 05508-270 Department of Biology Institute of Biosciences Letters and Exact Sciences – São Paulo State University São José do Rio Preto – (IBILCE/UNESP), Rua Cristóvão Colombo, 2265, CEP: 15054-000 Epidemiological Surveillance Departament of São José do Rio Preto Avenida Romeu Strazzi 199 CEP: 15084-010 Vila Sinibaldi São Paulo State University (Unesp) Institute for Biotechnology Alameda das Tecomarias s/n CEP: 18607-440 Chácara Capão Bonito Department of Biochemistry and Molecular Biology University of Texas Medical Branch 301 University Blvd Centro de Controle de Zoonoses Belo Horizonte Council Rua Édna Quintel 173 CEP: 31270-705 São Bernardo Faceres Medical School Avenida Anísio Haddad 6751 CEP: 15090-305 Jardim Francisco Fernandes Department of Epidemiology School of Public Health of the University of São Paulo Avenida Dr. Arnaldo 715 CEP: 01246-904 Department of Pathology and Center of Biodefense and Emerging Infectious Diseases Center for Tropical Diseases Institute for Human Infections and Immunity University of Texas Medical Branch 301 University Blvd Department of Biology Institute of Biosciences Letters and Exact Sciences – São Paulo State University São José do Rio Preto – (IBILCE/UNESP), Rua Cristóvão Colombo, 2265, CEP: 15054-000 São Paulo State University (Unesp) Institute for Biotechnology Alameda das Tecomarias s/n CEP: 18607-440 Chácara Capão Bonito National Institutes of Health: R24AI120942
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- 2018
17. Interações taxonômicas entre parasitos e morcegos de alguns municípios do estado de Minas Gerais
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Érica Munhoz de Mello, Élida Mara Leite Rabelo, Reinaldo José da Silva, Arnaldo Maldonado Júnior, Pedro Marcos Linardi, Fernando Araújo Perini, and Nelson Rodrigues da Silva Martins
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Ectoparasitos ,Hemoparasitos ,Parasitos ,Quirópteros ,Chiroptera ,Parasitologia ,Morcegos ,Helmintos - Abstract
Morcegos são hospedeiros de um elevado número de endo e ectoparasitos, porém o parasitismo nesses animais ainda é um campo pouco estudado. O objetivo deste trabalho foi identificar morfologicamente as espécies de helmintos e ectoparasitos, avaliar a presença de DNA de hemoparasitos e identificar molecularmente algumas espécies de helmintos de morcegos do Estado de Minas Gerais. Foram necropsiados 319 morcegos de 33 espécies recebidos pelo Centro de Controle de Zoonoses do município de Belo Horizonte, no período de janeiro de 2013 a março de 2016, sendo: 208 Molossidae, 66 Phyllostomidae, 43 Vespertilionidae e 2 Emballonuridae. Do total de animais, 65 (20,3%) morcegos apresentaram helmintos. O hospedeiro mais frequentemente parasitado foi Eumops glaucinus. O parasitismo nas fêmeas (60%) foi maior do que nos machos (40%) e 100% dos hospedeiros parasitados eram adultos. Foram recuperados 341 espécimes de parasitos: 94 Rictulariidae, 4 Spiruridae, 41 Onchocercidae, 19 Molineidae, 55 Capillariidae (Nematoda), 20 Lecithodendriidae, 49 Anenterotrematidae, 50 Urotrematidae (Trematoda) e 17 Hymenolepididae (Cestoda), além de 4 larvas de nematódeos não identificados e 11 espécimes de trematódeos não identificados devido à baixa qualidade dos espécimes. O parasitismo por mais de uma espécie de helminto foi verificado em 21 hospedeiros. O helminto mais prevalente foi Pterygodermatites (Paucipectines) sp. Do total de 2093 espécimes de morcegos examinados para ectoparasitos, apenas 94 (4,5%) apresentaram parasitos, sendo recuperado um total de 260 espécimes: 28 Spinturnicidae, 122 Macronyssidae, 12 Trombiculidae (Acari, Mesostigmata), um Argasidae (Acari, Ixodida), quatro Polyctenidae (Insecta, Hemiptera), um Pulicidae (Insecta, Siphonaptera) e 91 Streblidae (Insecta, Diptera). O município que apresentou o maior número de hospedeiros parasitados foi Belo Horizonte. Os morcegos foram mais frequentemente parasitados por streblídeos e ácaros macronissídeos, com 51 e 25 hospedeiros infectados, respectivamente. Dentre as moscas, Paratrichobius longicrus foi a espécie mais prevalente, encontrada em 73,5% (37/51) dos hospedeiros parasitados por espécimes da família Streblidae. Dentre as famílias de ácaros e carrapatos, o macronissídeo Chiroptonyssus venezolanus foi a espécie mais prevalente, encontrada em 44% (11/25) dos hospedeiros parasitados pela subclasse Acari. As fêmeas de morcegos apresentaram mais ectoparasitos (68,6%) do que os machos (31,4%), assim como o parasitismo foi maior em adultos (87,2%) do que em relação aos filhotes (7,7%) e indivíduos jovens (5,1%). O parasitismo por mais de uma espécie de ectoparasito foi verificado em 10 hospedeiros. Com relação aos hemoparasitos, resultados preliminares mostraram 13 morcegos positivos para Trypanosomatidae e 47 para Piroplasmida, sendo duas amostras positivas para ambos. Dentre as amostras sequenciadas dos piroplasmídeos, 3 amostras foram identificadas com Babesia sp. e 15 como Theileria sp. O sequenciamento destas apresentou alta similaridade à Babesia bigemina e ao grupo Theileria orientalis/Theileria buffeli, respectivamente. Este trabalho contribui para um levantamento epidemiológico de espécies parasitas de morcegos com comportamento incomum no estado de Minas Gerais. Bats are hosts of a high number of endo and ectoparasites, however, parasitism in these animals is still little investigated. The objective of this work was to identify morphologically the species of helminths and ectoparasites, to evaluate molecularly the presence of hemoparasites and to molecularly identify some species of helminthes of bats of the State of Minas Gerais. Three hundred nineteen bats received by the Zoonoses Control Center of the municipality of Belo Horizonte from January 2013 to March 2016, were necropsied, being: 208 Molossidae, 66 Phyllostomidae, 43 Vespertilionidae and 2 Emballonuridae. Of the total number of animals, 65 (20.38%) presented helminths. The most frequently parasitized host was Eumops glaucinus. The parasitism in females (60%) was higher than in males (40%) and 100% of parasitized hosts were adults. Three hundred forty one specimens of parasites were recovered: 94 Rictulariidae, 4 Spiruridae, 41 Onchocercidae, 19 Molineidae, 55 Capillariidae (Nematoda), 20 Lecithodendriidae, 49 Anenterotrematidae, 50 Urotrematidae (Trematoda) and 17 Hymenolepididae (Cestoda), in addition to four larvae of nematodes unidentified and 11 specimens of unidentified trematodes. The parasitism by more than one helminth species was verified in 21 hosts. The most prevalent helminth was Pterygodermatites (Paucipectines) sp. Of the total of 2093 specimens of bats examined for ectoparasites, only 94 (4.49%) had parasites, and a total of 260 specimens were recovered: 28 Spinturnicidae, 122 Macronyssidae, 12 Trombiculidae (Acari, Mesostigmata), an Argasidae (Acari, Ixodida), 4 Polyctenidae (Insecta, Hemiptera), one Pulicidae (Insecta, Siphonaptera), 91 Streblidae (Insecta, Diptera) and one unidentified insect specimen. The municipality with the highest number of parasitized hosts was Belo Horizonte. Bats were most frequently parasitized by streblid batflies and macronissids mites, with 51 and 25 infected hosts, respectively. Among the flies, Paratrichobius longicrus was the most prevalent species, found in 73.54% (37/51) of hosts parasitized by Streblidae family specimens. Among mite and tick families, the macronissídeo Chiroptonyssus venezolanus was the most prevalent species found in 44% (11/25) of the hosts parasitized by the Acari subclass. Female bats showed more ectoparasites (68.6%) than males (31.4%), and parasitism was higher in adults (87.2%) than in newborn animals (7.7%) and young individuals (5.1%). Parasitism by more than one species of ectoparasite was verified in 10 hosts. With regard to hemoparasites, preliminary results showed 13 bats positive for Trypanosomatidae and 47 for Piroplasmida, two samples being positive for both. Among the sequenced samples of the Piroplasmida, 3 samples were identified with Babesia sp. and 15 as Theileria sp. Their sequencing showed a high similarity to Babesia bigemina and to Theileria orientalis/Theileria buffeli, respectively. This work contributes to an epidemiological survey of parasite species of bats with abnormal behavior in the state of Minas Gerais.
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- 2017
18. Endo e ectoparasitos de serpentes Crotalus durissus Linnaeus, 1758 (Viperidae) de algumas localidades de Minas Gerais
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Érica Munhoz de Mello, Marcos Pezzi Guimaraes, Ricardo Toshio Fujiwara, Alan Lane de Melo, and Reinaldo José da Silva
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Rhabdias filicaudalis ,Parasitologia ,Hastospiculum onchocercum ,Maracaya ,Crotalus durissus ,belemensis ,Ophidascaris arndti - Abstract
O parasitismo em serpentes é um grande problema para a criação desses animais em cativeiro e o levantamento das espécies que normalmente infectam serpentes, pode ser utilizado para indicar procedimentos que visam diminuir a mortalidade de animais da criação, bem como reduzir os sinais clínicos derivados do parasitismo. O objetivo deste trabalho foi identificar os helmintos e ectoparasitos de Crotalus durissus (Serpentes, Viperidae) naturalmente parasitadas, recebidas pela Fundação Ezequiel Dias, oriundas de algumas localidades de Minas Gerais.. Foram eutanasiados 35 indivíduos adultos de C. durissus provenientes de 17 municípios do estado de Minas Gerais. As serpentes foram pesadas, medidas, inspecionadas à procura de ectoparasitos e abertas da cloaca até à boca. Cada órgão foi separado em uma placa com solução salina 0,85% para inspeção individual em microscópio estereoscópico à procura de helmintos. As fezes foram retiradas diretamente do intestino grosso dos animais para a realização de exame coproparasitológico. Os nematódeos e larvas de Acanthocephala foram fixados com formol 10% quente. Os ectoparasitos foram fixados em álcool 70%. As fezes foram sedimentadas, centrifugadas com éter e analisadas em microscópio óptico. Também foi realizada a descrição histopatológica da lesão em estômago provocado por Ophidascaris arndti. Dos 35 animais necropsiados, 24 (68,57%) estavam parasitados. Foram encontrados 19 (79,16%) animais parasitados com nematódeos Ophidascaris arndti, 6 (25%) com Hexametra boddaertii, 1 (4,16%) com Maracaya belemensis, 7 (29,16%) com Rhabdias filicaudalis, 4 (16,66%) com Kalicephalus inermis inermis, 1 (4,16%) com Kalicephalus costatus costatus, 1 (4,16%) com Kalicephalus sp., 1 (4,16%) com Hastospiculum onchocercum, 1 (4,16%) com uma larva de nematoda não identificada, 1 (4,16%) com larvas plerocercóides de Pseudophyllidea, 7 (29,16%) com larvas de Acanthocephala, 1 (4,16%) com ninfa de Porocephalus crotali e 2 (8,33%) com carrapatos da espécie Amblyomma rotundatum. Dos 35 exames coproparasitológicos, 24 (68,57%) indicaram a presença de ovos e/ou larvas de helmintos nas fezes, sendo: 11 (45,83%) de O. arndti, 5 (20,83%) de H. boddaertii/O.arndti, 6 (25%) de Rhabdias, 3 (12,5%) de Kalicephalus, 1 (4,16%) de H. onchocercum, 2 (8,33%) de Ascaridoidea e 3 (12,5%) de Rhabdtoidea. O EPF revelou ainda 2 (8,33%) animais parasitados com oocistos de coccídeos. As alterações patológicas no estômago ocasionadas por O. arndti foram compatíveis com o diagnóstico de gastrite granulomatosa multifocal, apresentando vários focos de lesão circunscrita com necrose central, delimitadas por infiltrado inflamatório linfoplasmohistiocitário, associado à presença de células epitelióides, localizados nas camadas submucosa, muscular e serosa. Parasitism in snakes is a major problem for breeding these animals in captivity. Therefore, a survey of species that normally infect snakes can be useful to indicate procedures aimed at reducing the mortality of animals in creation and also to reduce clinical signs of parasitism. The objective of this study was to identify the helminths and ectoparasites of Crotalus durissus (Serpentes, Viperidae) naturally parasitized, received by Foundation Ezequiel Dias, originating from some localities of Minas Gerais State. Thirty five adult individuals of C. durissus originated from 17 localities in the state of Minas Gerais were euthanized. Snakes were weighed, measured, inspected for the presence of ectoparasites and open from mouth to the cloaca. Each organ was separated on a plate with 0.85% saline for individual inspection in a stereomicroscope in a search for helminths. The feces were collected directly from the intestine of animals to conduct coproparasitologic. Nematodes and Acanthocephala larvae were fixed with 10% hot formalin. The ectoparasites were fixed in 70% alcohol. Feces were pelleted, centrifuged with ether and analyzed by light microscopy. A histopathological description of the injury caused in the stomach by the parasite Ophidascaris arndti, was performed. Of the 35 animals necropsied, 24 (68.57%) were parasitized. It was found 19 (79.16%) animals infected with nematodes Ophidascaris arndti, 6 (25%) with Hexametra boddaertii, 1 (4.16%) with Maracaya belemensis, 7 (29.16%) with Rhabdias filicaudalis, 4 (16 66%) with Kalicephalus inermis inermis, 1 (4.16%) with Kalicephalus costatus costatus, 1 (4.16%) with Kalicephalus sp., 1 (4.16%) with Hastospiculum onchocercum, 1 (4.16% ) with an unidentified nematode larvae, 1 (4.16%) with larvae of plerocercod Pseudophyllidea, 7 (29.16%) with larvae of Acanthocephala, 1 (4.16%) with nymph Porocephalus crotali and 2 (8,33%) with ticks of the species Amblyomma rotundatum. Of 35 fecal examinations, 24 (68.57%) indicated the presence of eggs and/or larvae of helminths, of which: 11 (45.83%) O. arndti, 5 (20.83%) of H. boddaertii/O. arndti, 6 (25%) of Rhabdias, 3 (12.5%) of Kalicephalus, 1 (4.16%) H. onchocercum, 2 (8.33%) Ascaroidea and 3 (12.5%) of Rhabdtoidea. The EPF also revealed 2 (8.33%) animals infected with coccidia oocysts. The pathological changes in the stomach caused by O. arndti were consistent with the diagnosis of granulomatous gastritis multifocal, with several foci of circumscribed lesion with central necrosis, surrounded by inflammatory infiltrate lymphoplasmohistiocytic associated with the presence of epithelioid cells located in submucosa, muscle and serosa layers.
- Published
- 2013
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