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While incidence of tuberculosis (TB) has decreased globally, in Paraguay, considered a medium-incidence country by the WHO, TB incidence has increased slightly from 42 per 100,000 in 2010 to 46 per 100,000 in 2022. We conducted a retrospective study of TB cases notified to the Paraguay National Program for Tuberculosis Control (NPTC) from 2018 to 2022 and quantified trends in specific populations identified as vulnerable. Of the 13,725 TB cases notified in Paraguay from 2018 to 2022, 2,331 (17%) occurred among incarcerated individuals and 1,743 (12.7%) occurred among self-identified Indigenous individuals. In 2022, the relative risk of TB was 87 and 6.4 among the incarcerated and Indigenous populations, compared with the non-incarcerated and non-Indigenous populations respectively. We found significant heterogeneity in TB incidence across Paraguay's 17 departments. Our findings highlight the urgency of expanding access to TB diagnosis, treatment, and prevention in populations at heightened risk of TB in Paraguay.

Introduction: Snakebite envenoming (SBE) is a public health problem in Paraguay where the presence of 15 medically important snake species has been reported. Blessed with large forested areas, its economy largely relies on agricultural production which increases the exposure of outdoor workers to the morbidity and mortality of SBE. Lack of sufficient and accurate epidemiological data highlights the importance of drawing an updated picture of SBE burden in the country., Methods: We performed a retrospective descriptive study on secondary SBE data reported to the national surveillance system between 2015 and 2021. We addressed the availability and quality of the data and assessed its epidemiological and sociodemographic burden in Paraguay over that time period., Results: In total, 1651 cases of SBE were reported between 2015 and 2021 representing an average of 235 cases per year (3.33 cases per 100 000 population). Overall, young males (68%, n=1125) of productive age (25 years old, IQR 29) in agricultural and/or livestock settings (47%, n=653) were the most affected population. Departments with a higher number of notifications were San Pedro (12%, n=191), Caazapá and Alto Paraná (10%, n=163). Regarding data quality, variables about clinical outcomes, treatment administration and case management were the worst reported., Conclusion: SBE is a public health issue that affects young workers in rural areas in Paraguay. It mostly remains unattended and improvements in its reporting need to be done in order to gain a better insight into both the health and social burden of this neglected disease., Competing Interests: None declared., (Copyright © Author(s) (or their employer(s)) 2024. Re-use permitted under CC BY-NC. Published by BMJ.)

Suicide is an important public health problem, fundamentally affecting the younger population and responding to multiple biological, psychological, and social causes. The objective of this study was to characterize changes in suicide mortality, suicide methods, and years of potential life lost from 2005 to 2019 in Paraguay. This observational, descriptive study used data from the Vital Statistics Information Subsystem of the Ministry of Public Health and Social Welfare. The average mortality rate from suicide was 4.9 per 100,000 inhabitants, with an increase from 4.2 between 2005 and 2009 to 5.8 from 2014 to 2019. Suicide was more common in men (75%) than in women. In men, the highest mortality rate was observed among those 20-24 years old, whereas in women, the ages most affected were the 15-19-year-old age group. The most-used method for suicide was hanging. The most frequent place of suicide occurrence was at home (73%). The seasonality of suicide occurrence showed a slight increase in the spring-summer months compared with autumn-winter (53% vs. 47%). The rate of potential years of life lost statistically significantly increased from 2005 to 2019. Public health measures need to be implemented to investigate the underlying reasons and implement interventions in the population to decrease suicide mortality in Paraguay.

Background: The increased risk of tuberculosis (TB) among people deprived of liberty (PDL) is due to individual and institution-level factors. We followed a cohort of PDL from 5 prisons in Paraguay to describe the risk of TB during incarceration and after they were released., Methods: We linked a 2013 national census of prisons with TB records from the TB Program from 2010 to 2021 to identify TB notifications among incarcerated and formerly incarcerated individuals. We used multivariable Cox regression models to quantify the risk of TB during and following incarceration and to identify risk factors associated with TB., Findings: Among 2996 individuals incarcerated, 451 (15.1%) were diagnosed with TB. Of these, 262 (58.1%) cases occurred during incarceration and 189 (41.9%) occurred in the community after release. In prison, the hazard ratio of developing TB was 1.97 (95% CI: 1.52-2.61) after six months of incarceration and increased to 2.78 (95% CI: 1.82-4.24) after 36 months compared with the first six months. The overall TB notification rate was 2940 per 100,000 person-years. This rate increased with the duration of incarceration from 1335 per 100,000 person-years in the first year to 8455 per 100,000 person-years after 8 years. Among former prisoners, the rate of TB decreased from 1717 in the first year after release to 593 per 100 000 person-years after 8 years of follow up., Interpretation: Our study shows the alarming risk of TB associated with prison environments in Paraguay, and how this risk persists for years following incarceration. Effective TB control measures to protect the health of people during and following incarceration are urgently needed., Funding: Paraguay National Commission of Science and Technology grant CONACYT PIN 15-705 (GS, GES, SA)., Competing Interests: All authors report no potential conflicts., (© 2023 Published by Elsevier Ltd.)

Background: Longitudinal cohort data of patients with tuberculosis (TB) and coronavirus disease 2019 (COVID-19) are lacking. In our global study, we describe long-term outcomes of patients affected by TB and COVID-19., Methods: We collected data from 174 centres in 31 countries on all patients affected by COVID-19 and TB between 1 March 2020 and 30 September 2022. Patients were followed-up until cure, death or end of cohort time. All patients had TB and COVID-19; for analysis purposes, deaths were attributed to TB, COVID-19 or both. Survival analysis was performed using Cox proportional risk-regression models, and the log-rank test was used to compare survival and mortality attributed to TB, COVID-19 or both., Results: Overall, 788 patients with COVID-19 and TB (active or sequelae) were recruited from 31 countries, and 10.8% (n=85) died during the observation period. Survival was significantly lower among patients whose death was attributed to TB and COVID-19 versus those dying because of either TB or COVID-19 alone (p<0.001). Significant adjusted risk factors for TB mortality were higher age (hazard ratio (HR) 1.05, 95% CI 1.03-1.07), HIV infection (HR 2.29, 95% CI 1.02-5.16) and invasive ventilation (HR 4.28, 95% CI 2.34-7.83). For COVID-19 mortality, the adjusted risks were higher age (HR 1.03, 95% CI 1.02-1.04), male sex (HR 2.21, 95% CI 1.24-3.91), oxygen requirement (HR 7.93, 95% CI 3.44-18.26) and invasive ventilation (HR 2.19, 95% CI 1.36-3.53)., Conclusions: In our global cohort, death was the outcome in >10% of patients with TB and COVID-19. A range of demographic and clinical predictors are associated with adverse outcomes., Competing Interests: Conflict of interest: The authors have no potential conflicts of interest to disclose., (Copyright ©The authors 2023.)

Background: Paraguay has recently experienced an exponential increase in chikungunya cases, leading to psychological distress, particularly anxiety., Aim: To develop and validate the Chikungunya Anxiety Scale (CHIKAS)., Materials and Methods: An initial scale of 18 items was used, which was subjected to validation by expert judgment to obtain 14 items. To determine construct validity, exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) have been employed, and internal and convergent validity were determined. Demographic, socioeconomic, and health status data were also collected., Results: The study included 974 participants. The final scale consisted of 12 items with evidence of a two-factor model (psychological and physical). The internal validity was good (McDonald's omega = 0.882). The CFA showed good adjustment indices. Regarding participant characteristics, a relationship was found between anxiety due to chikungunya and gender, employment, mental diagnosis, medication use, and chikungunya infection., Conclusion: The final 12-item CHIKAS had strong psychometric properties and was a two-factor model., Competing Interests: There are no conflicts of interest., (Copyright: © 2023 Industrial Psychiatry Journal.)

Background: Vaccine effectiveness (VE) estimates vary by population characteristics and circulating variants. North America and Europe have generated many COVID-19 VE estimates but relied heavily on mRNA vaccines. Fewer estimates are available for non-mRNA vaccines and from Latin America. We aimed to estimate the effectiveness of several COVID-19 vaccines in preventing SARS-CoV-2-associated severe acute respiratory infection (SARI) in Paraguay from May 2021 to April 2022., Methods: Using sentinel surveillance data from four hospitals in Paraguay, we conducted a test-negative case-control study to estimate COVID-19 vaccine effectiveness against SARI by vaccine type/brand and period of SARS-CoV-2 variant predominance (Gamma, Delta, Omicron). We used multivariable logistic regression adjusting for month of symptom onset, age group, and presence of ≥1 comorbidity to estimate the odds of COVID-19 vaccination in SARS-CoV-2 test-positive SARI case-patients compared to SARS-CoV-2 test-negative SARI control-patients., Results: Of 4,229 SARI patients, 2,381 (56%) were SARS-CoV-2-positive case-patients and 1,848 (44%) were SARS-CoV-2-negative control-patients. A greater proportion of case-patients (73%; 95% CI: 71-75) than of control-patients (40%; 95% CI: 38-42) were unvaccinated. During the Gamma variant-predominant period, VE estimates for partial vaccination with mRNA vaccines and Oxford/AstraZeneca Vaxzevria were 90.4% (95% CI: 66.4-97.6) and 52.2% (95% CI: 25.0-69.0), respectively. During the Delta variant-predominant period, VE estimates for complete vaccination with mRNA vaccines, Oxford/AstraZeneca Vaxzevria, or Gamaleya Sputnik V were 90.4% (95% CI: 74.3-97.3), 83.2% (95% CI: 67.8-91.9), and 82.9% (95% CI: 53.0-95.2), respectively. The effectiveness of all vaccines declined substantially during the Omicron variant-predominant period., Conclusions: This study contributes to our understanding of COVID-19 VE in Latin America and to global understanding of vaccines that have not been widely used in North America and Europe. VE estimates from Paraguay can parameterize models to estimate the impact of the national COVID-19 vaccination campaign in Paraguay and similar settings., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023. Published by Elsevier Ltd.)

In this Policy Forum piece, Aditya Narayan and colleagues discuss the challenges and opportunities for tuberculosis preventive treatment in carceral settings., Competing Interests: The spouse of SS was employed by Merck Pharmaceuticals 1997-2007 and retains stock in his retirement account. There is no conflict of interest with the submitted work, but is included in the interest of full disclosure. The other authors have declared that no competing interests exist., (Copyright: © 2023 Narayan et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)

The spread of Chikungunya virus is a major public health concern in the Americas. There were >120,000 cases and 51 deaths in 2023, of which 46 occurred in Paraguay. Using a suite of genomic, phylodynamic, and epidemiologic techniques, we characterized the ongoing large chikungunya epidemic in Paraguay.

Competing Interests: All authors have completed and submitted the International Committee of Medical Journal Editors form for disclosure of potential conflicts of interest. No potential conflicts of interest were disclosed.

Dengue virus (DENV) has been a major public health concern in Paraguay, with frequent outbreaks occurring since early 1988. Although control measures have been implemented, dengue remains a significant health threat in the country, and continued efforts are required for prevention and control. In response to that, in collaboration with the Central Public Health Laboratory in Asunción, we conducted a portable whole-genome sequencing and phylodynamic analysis to investigate DENV viral strains circulating in Paraguay over the past epidemics. Our genomic surveillance activities revealed the co-circulation of multiple DENV serotypes: DENV-1 genotype V, the emerging DENV-2 genotype III, BR4-L2 clade, and DENV-4 genotype II. Results additionally highlight the possible role of Brazil as a source for the international dispersion of different viral strains to other countries in the Americas emphasizing the need for increased surveillance across the borders, for the early detection and response to outbreaks. This, in turn, emphasizes the critical role of genomic surveillance in monitoring and understanding arbovirus transmission and persistence locally and over long distances.

The spread of vector-borne viruses, such as CHIKV, is a significant public health concern in the Americas, with over 120,000 cases and 51 deaths in 2023, of which 46 occurred in Paraguay. Using a suite of genomic, phylodynamic, and epidemiological techniques, we characterized the ongoing large CHIKV epidemic in Paraguay., Article Summary Line: Genomic and epidemiological characterization of the ongoing Chikungunya virus epidemic in Paraguay.

Recent rises in incident tuberculosis (TB) cases in Paraguay and the increasing concentration of TB within prisons highlight the urgency of targeting strategies to interrupt transmission and prevent new infections. However, whether specific cities or carceral institutions play a disproportionate role in transmission remains unknown. We conducted prospective genomic surveillance, sequencing 471 Mycobacterium tuberculosis complex genomes, from inside and outside prisons in Paraguay's two largest urban areas, Asunción and Ciudad del Este, from 2016 to 2021. We found genomic evidence of frequent recent transmission within prisons and transmission linkages spanning prisons and surrounding populations. We identified a signal of frequent M. tuberculosis spread between urban areas and marked recent population size expansion of the three largest genomic transmission clusters. Together, our findings highlight the urgency of strengthening TB control programs to reduce transmission risk within prisons in Paraguay, where incidence was 70 times that outside prisons in 2021., (© 2023. The Author(s).)

Background: COVID-19, caused by the severe acute respiratory syndrome virus type-2 (SARS-CoV-2), was declared a pandemic in March 2020. Seroprevalence studies are useful to estimate the proportion of the population previously infected, quantify the magnitude of transmission, estimate the fatality rate, evaluate the effect of interventions, and estimate the degree of immunity of the population., Aim: To determine the extension of the infection and the cumulative incidence of age-specific infection, determined by seropositivity in the population of the sanitary regions of Asunción and the Central Department of Paraguay., Methods: Population-based cohort study. In Asunción 126 households and in the Central Department 609 were surveyed between December 2020 to March 2021. Three visits were made to the selected households., Results: The testing rate was 66.6%, 1,699 people (324 in Asunción and 1,375 in Central) of the 2,553 people registered. In the first, second and third rounds, seroprevalences were 15.5%, 15.4% and 14.3% in Asunción, respectively; in Central 23.1%, 27.8% and 26.9%, respectively. There was a seroconversion between the first and second rounds of 5.9%, and in the third round 6.5%; the accumulated global seroprevalence was 26.9% (95% CI: 24.8-19.1); in Asunción 23.1% (95% CI: 18.9-28.0) and in Central 27.8% (95% CI: 25.5-30.2). 8.5% of the participants reported symptoms; of them, 54.2% had positive serology., Conclusion: The sero-prevalence was high with a low proportion of people with symptoms.

Background: Tuberculosis (TB) is one of the ten leading causes of death worldwide., Aim: To characterize the clinical and epidemiological point of view of TB cases reported in the Department of Caaguazú-Paraguay, from 2014 to 2017., Methods: Observational, descriptive, retrospective study; Population: 659 cases of TB registered in the National Tuberculosis Control Program (NTCP); variables: age, sex, population group, type of TB, TB/HIV coinfection. We procesed database in Excel 2016 © using Stata 14.0®., Results: 63.3% were of male gender, average age: 35.8 years, 39.6% were indigenous and 85.4% were liberty deprived persons known as inmates (LDP), 89.6% had pulmonary TB and 2,4% had TB/HIV coinfection. Incidence rate exceed 21.6/100,000 inhabitants in 2014. Indigenous incidence was 76.5/100,000 inhabitants in 2017, LDP incidence was 2,272.1/ 100,000 inhabitants in 2017., Conclusion: The incidence of TB in the Department of Caaguazú is low, mainly affecting men, while TB incidence in indigenous people and LDP was high.

Objective: To determine the factors associated with the unsuccessful treatment of patients diagnosed with drug-sensitive tuberculosis (TB) in Paraguay., Methods: Retrospective cohort study, with data collected from the national program between January 2016 and March 2017. Unsuccessful treatment was defined as patients who were lost to follow-up, failed treatment, or died. Factors associated with unsuccessful treatment were determined using Poisson regression; the adjusted relative risk (RR) and 95% confidence interval (95% CI) were estimated by health region., Results: A total of 3 034 cases were studied: 2 189 (72.1%) were successfully treated (cured: 1 221 [40.2%], complete treatment: 968 [31.9%]) and 845 (27.9%) were unsuccessfully treated (treatment failure: 40 [1.3%], loss to follow-up: 466 [15.4%] and deaths: 339 [11.2%]). Factors associated with unsuccessful treatment were masculine sex 1.28 (1.14- 1.42), indigenous descent 1.3 (1.09- 1.54), lack of report of area of residence 1.27 (1.02- 1.57), TB/HIV coinfection 1.97 (1, 63- 2.38), illicit drug addiction 1.38 (1.16- 1.63), alcohol consumption 1.25 (1.02- 1.52), previous treatment 1.23 (1.10- 1.38) and lack of treatment monitoring data 4.92 (3.69- 6.56). Being deprived of liberty 0.65 (0.47- 0.89) and TB/diabetes comorbidity 0.80 (0.67- 0.95) were considered protective factors., Conclusion: Paraguay has a high percentage of unsuccessful treatment in almost the entire country, without reaching the target proposed by the World Health Organization. Associated risk factors such as HIV, consumption of legal and illicit drugs, and being indigenous highlight the need to revise the treatment strategies with an inter-institutional approach.