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Your search keyword '"Ning Zhou"' showing total 2 results
Start Over Author "Ning Zhou" Topic anopheles Publisher biomed central
2 results on '"Ning Zhou"'

1. Receptivity to malaria in the China–Myanmar border in Yingjiang County, Yunnan Province, China

Author

Hong Tu, Xu-Can Zeng, Xue-Zhong Wang, Shao-Sen Zhang, Xiao-Dong Sun, Tianmu Chen, Hong-Ning Zhou, Xiang-rui Guo, Chun-Hai Luo, Shui-Sen Zhou, and Zu-Rui Lin

Subjects
0301 basic medicine, Rural Population, Veterinary medicine, China, lcsh:Arctic medicine. Tropical medicine, lcsh:RC955-962, 030231 tropical medicine, ved/biology.organism_classification_rank.species, Mosquito Vectors, Biology, lcsh:Infectious and parasitic diseases, Anopheles sinensis, 03 medical and health sciences, 0302 clinical medicine, Anopheles community, parasitic diseases, Anopheles, medicine, Dominance (ecology), Animals, Humans, lcsh:RC109-216, Population Density, Larva, ved/biology, Research, Insect Bites and Stings, 030108 mycology & parasitology, medicine.disease, biology.organism_classification, Biota, Community structure, Malaria, China–Myanmar border, Infectious Diseases, Receptivity, Species evenness, Key (lock), Parasitology, Species richness, Malaria transmission, Re-establishment
Abstract

Background The re-establishment of malaria has become an important public health issue in and out of China, and receptivity to this disease is key to its re-emergence. Yingjiang is one of the few counties with locally acquired malaria cases in the China–Myanmar border in China. This study aimed to understand receptivity to malaria in Yingjiang County, China, from June to October 2016. Methods Light-traps were employed to capture the mosquitoes in 17 villages in eight towns which were categorized into four elevation levels: level 1, 0–599 m; level 2, 600–1199 m; level 3, 1200–1799 m; and level 4, > 1800 m. Species richness, diversity, dominance and evenness were used to picture the community structure. Similarity in species composition was compared between different elevation levels. Data of seasonal abundance of mosquitoes, human biting rate, density of light-trap-captured adult mosquitoes and larvae, parous rate, and height distribution (density) of Anopheles minimus and Anopheles sinensis were collected in two towns (Na Bang and Ping Yuan) each month from June to October, 2016. Results Over the study period, 10,053 Anopheles mosquitoes were collected from the eight towns, and 15 Anopheles species were identified, the most-common of which were An. sinensis (75.4%), Anopheles kunmingensis (15.6%), and An. minimus (3.5%). Anopheles minimus was the major malaria vector in low-elevation areas (

Published
2017

2. Insecticide resistance of Anopheles sinensis and An. vagus in Hainan Island, a malaria-endemic area of China.

Author

Qian Qin, Yiji Li, Daibin Zhong, Ning Zhou, Xuelian Chang, Chunyuan Li, Liwang Cui, Guiyun Yan, and Xiao-Guang Chen

Subjects
ANOPHELES, INSECTICIDE resistance, MALARIA transmission, MONOOXYGENASES, DELTAMETHRIN
Abstract

Background Malaria is one of the most important public health problems in Southeast Asia, including Hainan Island, China. Vector control is the main malaria control measure, and insecticide resistance is a major concern for the effectiveness of chemical insecticide control programs. The objective of this study is to determine the resistance status of the main malaria vector species to pyrethroids and other insecticides recommended by the World Health Organization (WHO) for indoor residual sprays. Methods The larvae and pupae of Anopheles mosquitoes were sampled from multiple sites in Hainan Island, and five sites yielded sufficient mosquitoes for insecticide susceptibility bioassays. Bioassays of female adult mosquitoes three days after emergence were conducted in the two most abundant species, Anopheles sinensis and An. vagus, using three insecticides (0.05% deltamethrin, 4% DDT, and 5% malathion) and following the WHO standard tube assay procedure. P450 monooxygenase, glutathione S-transferase and carboxylesterase activities were measured. Mutations at the knockdown resistance (kdr) gene and the ace-1gene were detected by DNA sequencing and P CR-RFLP analysis, respectively. Results An. sinensis and An. vagus were the predominant Anopheles mosquito species. An. sinensis was found to be resistant to DDT and deltamethrin. An. vagus was susceptible to deltamethrin but resistant to DDT and malathion. Low kdr mutation (L1014F) frequency (<10%) was detected in An. sinensis, but no kdr mutation was detected in An. vagus populations. Modest to high (45%-75%) ace-1 mutation frequency was found in An. sinensis populations, but no ace-1 mutation was detected in An. vagus populations. Significantly higher P450 monooxygenase and carboxylesterase activities were detected in deltamethrin-resistant An. sinensis, and significantly higher P450 monooxygenase, glutathione S-transferase and carboxylesterase activities were found in malathion-resistant An. vagus mosquitoes. Conclusions Multiple insecticide resistance was found in An. sinensis and An. vagus in Hainan Island, a malaria-endemic area of China. Cost-effective integrated vector control programs that go beyond synthetic insecticides are urgently needed. [ABSTRACT FROM AUTHOR]

Published
2014
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