Sociodemographic, behavioral, obstetric, and healthcare factors associated with low weight at birth: a case-control study

ABSTRACT BACKGROUND: Understanding social determinants is crucial for implementing preventive strategies, especially for low birth weight (LBW)—a public health issue that severely increases the risk of morbimortality in children. OBJECTIVE: This study aimed to identify the factors associated with LBW among newborns, assisted by the Brazilian Unified Health System. DESIGN AND SETTING: It analyzed data from newborns and their mothers. The sample was selected by convenience from users of the public health system in Francisco Beltrão (Paraná, Brazil). METHODS: Cases (n = 26) were babies weighing ≤ 2,500 g and controls (n = 52) > 2,500 g. All babies were assessed and paired by sex and date of birth in a 1:2 proportion. Statistical power was computed a posteriori, revealing a power of 87% (α = 0.05). RESULTS: Strong and significant differences were found in the bivariate analysis, in which the number of current smokers or those who quit during pregnancy was higher among mothers of babies with LBW. Moreover, the gestational weeks were lower among these cases. Logistic regression models indicated that the gestational week (odds ratio [OR] = 0.17, 95% confidence interval [CI]:0.05-0.54) and fathers' educational level (high school or above; OR = 0.22, 95% CI:0.06-0.99) were related to lower chances of low birth weight. CONCLUSIONS: Our findings confirm previous investigations on LBW's multi-causality, showing that the gestational week could reduce up to 82% chances of a baby being born with ≤ 2,500 g. Its association with paternal education underlines the importance of comprehensive policies to protect newborns.

Evaluation of oxidative stress level: reactive oxygen species, reduced glutathione, and D-dimer in patients hospitalized due to COVID-19.

Elevated D-dimer levels at hospital admission may also indicate a higher likelihood of progressing to a severe or critical state. This study aimed to assess reactive oxygen species (ROS), non-enzymatic antioxidant reduced glutathione (GSH), and D-dimer levels in COVID-19 patients upon admission, examining their association with mortality outcomes. Data was collected from the medical records of 170 patients hospitalized in a referral hospital unit between March 2020 and December 2021. Patients were divided into two groups: the ward bed group (n = 87), comprising 51% with moderate clinical conditions, and the intensive care unit (ICU) group (n = 83), comprising 49% with severe conditions. The mean age was 59.4 years, with a male predominance of 52.4%. The overall death rate was 43%, with 30.6% in the moderate group and 69.4% in the severe group. The average time from symptom onset to hospitalization was 6.42 days. Results showed that non-survivors had high D-dimer and ROS counts, longer ICU stays, and worse saturation levels at admission. In conclusion, elevated ROS and D-dimer levels may contribute to worse outcomes in critically ill patients, potentially serving as specific and sensitive predictors of poor outcomes upon admission.

Sociodemographic, behavioral, obstetric, and healthcare factors associated with low weight at birth: a case-control study.

BACKGROUND: Understanding social determinants is crucial for implementing preventive strategies, especially for low birth weight (LBW)-a public health issue that severely increases the risk of morbimortality in children. OBJECTIVE: This study aimed to identify the factors associated with LBW among newborns, assisted by the Brazilian Unified Health System. DESIGN AND SETTING: It analyzed data from newborns and their mothers. The sample was selected by convenience from users of the public health system in Francisco Beltrão (Paraná, Brazil). METHODS: Cases (n = 26) were babies weighing ≤ 2,500 g and controls (n = 52) > 2,500 g. All babies were assessed and paired by sex and date of birth in a 1:2 proportion. Statistical power was computed a posteriori, revealing a power of 87% (α = 0.05). RESULTS: Strong and significant differences were found in the bivariate analysis, in which the number of current smokers or those who quit during pregnancy was higher among mothers of babies with LBW. Moreover, the gestational weeks were lower among these cases. Logistic regression models indicated that the gestational week (odds ratio [OR] = 0.17, 95% confidence interval [CI]:0.05-0.54) and fathers' educational level (high school or above; OR = 0.22, 95% CI:0.06-0.99) were related to lower chances of low birth weight. CONCLUSIONS: Our findings confirm previous investigations on LBW's multi-causality, showing that the gestational week could reduce up to 82% chances of a baby being born with ≤ 2,500 g. Its association with paternal education underlines the importance of comprehensive policies to protect newborns.

Factors Associated with HPV Knowledge Among Professionals in the City of Francisco Beltrão, Brazil.

The human papilloma virus (HPV) is the most common sexually transmitted infection, affecting nearly 50% of the world population. HPV can lead to tissue damage and is associated with many types of cancers. Healthcare professionals' knowledge regarding HPV infection are essential in assuring favorable outcomes for those exposed to HPV, either in prevention or in intervention efforts. In this cross-sectional, population-based study, we explored the levels of HPV knowledge among health professionals in a Brazilian municipality. In total, 260 individuals (90% women), aged 21-66 years (Mean = 40.10 ± 9.30) participated in this investigation and responded to standard questionnaires measuring HPV knowledge as well as sociodemographic and occupational data. Regarding HPV knowledge, 85 (32.8%) individuals were considered to have sufficient knowledge (scored good or very good according to percentile classifications), whereas 174 (67.2%) were labeled as having insufficient knowledge. Mann-Whitney tests showed higher HPV knowledge among those who reported not having children (p = 0.05) and lower levels in the group of community health workers (CHW; p < 0.001). Logistic regression analyses showed that having children (OR = 0.50; 95%CI: 0.26, 0.96) and being a CHW (OR = 0.52; 95%CI: 0.28, 0.97) were independently associated with insufficient knowledge about HPV. In conclusion, data reported in this study might aid in understanding factors associated with HPV management given the evidence collected from healthcare professionals, suggesting strategies to promote both health education and promotion.

Working Conditions and Health of Prison Officers in Paraná (Brazil).

OBJECTIVES: This cross-sectional study was carried out to identify the associations between working and health conditions among prison officers at a state prison in Paraná, Brazil. MATERIAL AND METHOD: A proportional and stratified random sample of 125 individuals was used. The participants, who were not identified, completed a self-administered questionnaire. RESULTS: The results showed a prevalence of minor psychiatric disorders (MPD) of 30.4% (95%CI: 22.4-39.2). A total of 17.9% of the respondents had persistent stress (95%CI: 12.2-25.2), 66.4 had up to five health-related complaints (95%CI: 58.4-75.2) and 9.6% had scores that indicated higher risk for alcohol abuse and/or dependance (95%CI:4.8-16.0). Multivariate analyses showed that with an MPD outcome, health problems (p<0.01), physical environment (p=0.013) and organizational risks (p<0.01) were significant predictors. Persistent stress was predicted by age (p=0.031), health problems (p<0.01) and organizational risks (p=0.023), while health complaints were associated with health problems (p<0.01) and physical environment (p<0.01). There were no significant predictors for higher risk for alcohol abuse and/or dependance. DISCUSSION: In general, the results demonstrate the precarious nature of the work of prison officers, and reveal the importance of further studies to evaluate whether this is a specific reality of the unit that was investigated, or whether these results are common in other prison environments.

Seroprevalence and factors associated with hepatitis B virus exposure in the incarcerated population from southern Brazil.

Hepatitis B viral infection (HBV) in prisons poses serious public health challenges because it significantly contributes to the increase in both morbidity and mortality indicators worldwide. Research has shown high HBV prevalence among inmates when compared to the general population. In this study, we estimated the prevalence of HBV exposure and its risk factors among 1,132 inmates detained in high security institutions. A cross-sectional, epidemiological study was carried out in 11 male-only prisons in the State of Paraná, Brazil, between May 2015 to December 2016. HBV exposure was explored using a variety of methods, including HBsAg, anti-HBs, and total anti-HBc. Data were analyzed using univariate and multivariate techniques. The overall prevalence of HBV exposure was 11.9% (95% CI: 10.9-12.8), totaling 135 individuals. In the multivariate analyses, risk factors that remained statistically significant were related to the penitentiary location (Francisco Beltrão; OR = 5.59; 95% CI: 3.32-9.42), age (over 30 years; OR = 5.78; 95% CI: 3.58-9.34), undergoing tattooing procedures in prison (OR = 1.64; 95% CI: 1.03-2.60), self-reported sexual activities with a known drug user (OR = 1.67; 95% CI: 1.12-2.48) and having a history of previous history of hepatitis B or C infection (OR = 2.62; 95% CI: 1.48-4.64). The findings indicate that public policies-including vaccination, early diagnosis, harm reduction strategies, and adequate treatment-should be designed and delivered in the same way for both the incarcerated and the general population in order to reduce the prevalence of HBV and its associated consequences.

Prevalence of HPV and associated factors in a population of women living in southern Brazil.

OBJECTIVE: To determine the prevalence of HPV and investigate factors associated with the infection in women in the city of Francisco Beltrão, southwest Paraná, attending the public health system. METHODS: This cross-sectional study included 324 women, aged between 18 and 65 years, who were attending public health services for routine gynecological consultation. Interviews were conducted to obtain information about socioeconomic, sexual, gynecological, and life habits. After performing the Papanicolaou test, endocervical brush was employed to detect HPV by polymerase chain reaction with the primers MY09-MY11. RESULTS: The prevalence of HPV was 6.8%, out of which 58.3% presented with cytopathologic alterations. And the presence of current cervical alterations can increase the chances of having HPV by almost 33 times (ORadj: 32.688; p < 0.001), recent vaginal infection increased the chances of HPV infection by 2.7 times (ORadj: 2.773; p = 0.04). The non-white ethnicity increased HPV infection chances threefold (ORadj: 3.058; p = 0.039). CONCLUSION: The main finding was low prevalence of HPV infection. Factors that may be linked to HPV infection were cervical alterations, recent vaginal infection, and women's ethnicity.

University Students' Knowledge about the Relation between Human Papillomavirus (HPV) and Head and Neck and Oral Cancers.

INTRODUCTION: Human papillomavirus (HPV) causes the most common sexually transmitted infection (STI) in the world. It affects people regardless of gender and age, causing genital warts and cancer. OBJECTIVE: To evaluate university students' knowledge of HPV and its relationship with head and neck and oral cancers. METHODS: This is a cross-sectional study using an online questionnaire administered to undergraduate students at a public university (n=335). RESULTS: In total, 69.3% of the participants were unaware of the relationship between HPV and head and neck cancers and 34.6% claimed that HPV may not cause oral cancer.  The chances of knowing about the relationship of HPV with head and neck cancers were significant for participants who knew that HPV could be asymptomatic (OR = 9.9; p = 0.029), that might cause genital warts in men (OR = 4.0; p = 0.015), and those aged 24 years or older (OR = 1.9; p = 0.021). However, undergraduate students in the field of health and medicine (OR = 0.419; p = 0.002), who had sex at least twice a week (OR = 0.471; p = 0.017), and were unaware of the target public for the HPV vaccine (OR: 0.222, p<0.001) were less likely to know about the relationship. Students who knew of the relationship between HPV and female (OR = 3.6; p = 0.010) and male genital warts (OR = 3.0; p = 0.005) or were immunized (OR = 1.8; p = 0.020) were more likely to understand the viral interaction with oral cancer. Those who were unaware of the population eligible for HPV vaccine (OR = 0.493; p = 0.017) also showed gaps in their knowledge of this relationship. CONCLUSION: Our findings showed that there were limitations in the knowledge about HPV, its vaccine, and its relationship with head and neck and oral cancers.

GSTT1 and GSTM1 polymorphisms with human papillomavirus infection in women from southern Brazil: a case-control study.

BACKGROUND: Important risk factors for the most common sexually transmitted infection (STI) in the world, human papillomavirus (HPV), include early sexual activity, use of contraceptives, tobacco smoking, and immunological and genetic factors. This study aimed to investigate the relationship between GSTM1 and GSTT1 polymorphisms and HPV infection and associated risk factors in a group of women assisted in the public health system of southwestern Paraná, Brazil. METHODS AND RESULTS: A case-control study was designed with 21 women with HPV matched by age in the case group and 84 women without the virus in the control group. Viral detection was conducted via polymerase chain reaction (PCR) and GSTM1 and GSTT1 genotyping by Multiplex PCR. The results showed that the GSTT1 null allele was a protective factor against infection (ORadj 0.219; 95% CI 0.078-0.618; p = 0.004). No relationship was observed for the GSTM1 gene. Smoking was defined as a risk factor (ORadj 3.678; 95% CI 1.111-12.171; p = 0.033), increasing the chances of HPV by up to 3.6 times. CONCLUSION: This study showed, for the first time, the relationship between GSTM1 and GSTT1 genetic polymorphisms and HPV. We found that this relationship protected women from southern Brazil from viral infection, but not from susceptibility.

Prevalence and factors associated to cervical changes in units from the Single Health System.

OBJECTIVE: To estimate the prevalence and risk factors associated with cytopathological changes in the uterine cervix of women treated by the Unified Health System. METHOD: This is a cross-sectional study carried out with 350 women, between 14 and 79 years old who underwent pap smear tests in heath units in Francisco Beltrão, Paraná. Cervical cytopathological analyses and a questionnaire were applied to obtain socioeconomic information, as well as data on sexual behavior, gynecological aspects, and life habits. Chi-square test and logistic regression with p <0.05 were applied for statistical analysis. RESULTS: The prevalence of cervical changes was 3.4% and the main categories found were low-grade cervical intraepithelial lesion, high-grade cervical intraepithelial lesion, and atypical cells of undetermined significance. From these, the first were present in 16.6% of women under 25 years old. The multivariate analysis pointed at associations between previous results of the cytopathology test (OR = 25.693), smoking (OR = 7.576), and oral contraceptives (OR = 5.265) and the outcome. CONCLUSION: Women with a history of previous cervical cytopathological abnormality, use of oral contraceptives, and smokers were more likely to have an abnormal result in the pap smear test.

Relationship between GSTM1 and GSTT1 polymorphisms and HPV infection: a systematic review.

Human Papillomavirus (HPV) is the most important risk factor for cervical cancer, although not the only one. The allelic polymorphism of enzymes acting on carcinogen metabolism has shown to influence the risk of both intraepithelial lesions and cervical carcinogenesis. Several studies found an association between GSTM1/GSTT1 null genotypes and risk of cancer. This research aimed to review studies addressing the relationship between GSTT1 and GSTM1 and HPV infection in women, with or without cervical pathologies. A database search was conducted in four databases - PubMed, LILACS, SciELO, and Virtual Health Library - using the following descriptors: Glutathione transferase, HPV, and Genetic polymorphism. In total, we found 319 studies. After screening titles and abstracts, 27 articles were selected for full-text read, among which 20 were excluded and 7 were included in the review. No study has exclusively approached the relationship between the virus and GSTM1/GSTT1 variants. However, studies investigating the association between single nucleotide polymorphisms (SNPs) and cervical lesions or cancer found a probable relationship between them and infections with high-risk oncogenic subtypes. Although inconclusive, GSTT1 null alleles were more common in women with more aggressive HPV than GSTM1.

Genome interaction of the virus and the host genes and non-coding RNAs in SARS-CoV-2 infection.

In this review, we highlight the interaction of SARS-CoV-2 virus and host genomes, reporting the current studies on the sequence analysis of SARS-CoV-2 isolates and host genomes from diverse world populations. The main genetic variants that are present in both the virus and host genomes were particularly focused on the ACE2 and TMPRSS2 genes, and their impact on the patients' susceptibility to the virus infection and severity of the disease. Finally, the interaction of the virus and host non-coding RNAs is described in relation to their regulatory roles in target genes and/or signaling pathways critically associated with SARS-CoV-2 infection. Altogether, these studies provide a significant contribution to the knowledge of SARS-CoV-2 mechanisms of infection and COVID-19 pathogenesis. The described genetic variants and molecular factors involved in host/virus genome interactions have significantly contributed to defining patient risk groups, beyond those based on patients' age and comorbidities, and they are promising candidates to be potentially targeted in treatment strategies for COVID-19 and other viral infectious diseases.

Effects of GSTT1 and GSTM1 polymorphisms in glutathione levels and breast cancer development in Brazilian patients.

Polymorphisms in the glutathione transferase enzymes (GSTs) genes have been associated with susceptibility to develop breast cancer (BC), but few are known regarding its role on this disease prognosis and impact on antioxidant status. This study evaluated the polymorphisms of GSTM1 and GSTT1 genes and their relationship with BC susceptibility and prognostic, as well as its impact on plasma reduced glutathione (GSH) levels. The present study included 121 women with invasive ductal BC and 151 healthy controls. Polymorphisms analyses were performed using the polymerase chain reaction (PCR) technique and GSH levels were measured with the Ellman's reagent. GSTT1 (OR 1.29; p = 0.39) and GSTM1 (OR 1.03; p = 0.91) polymorphisms did not show any association with BC susceptibility. The mean concentration values in nmol/L of GSH were 20.37 ± 5.82 for patients with null genotypes for both genes, 19.75 ± 3.47 for null GSTT1, 17.22 ± 1.35 for active GSTT1, 18.82 ± 1.96 for absent GSTM1, and 16.59 ± 1.66 for active GSTM1, but no significance was found. Therefore, it can be concluded that the behavior of these polymorphisms concerning BC might be not only related to the absence of enzymatic expression but may also be related to the body's response with its antioxidant mechanisms and it should be further studied.

Evidence on Human Exposure to Pesticides and the Occurrence of Health Hazards in the Brazilian Population: A Systematic Review.

Brazil is among the biggest pesticide consumers in the world, with its population severely exposed to tons of such substances, both because of environmental contamination and occupational use. The health consequences of pesticide exposure are well-documented, but still sparse regarding Brazilian population. This study systematically reviewed the Brazilian studies published that address the relationship between exposure to pesticides and health problems in the Brazilian population. Also, information about pesticide use in Brazil is provided. The included studies showed that exposure to pesticides has a relevant impact on the health of the Brazilian population, regardless of age and gender, and on workers in rural areas or not. Most poisoning events seem to result from the continuous use of pesticides, whether occupationally or environmentally, characterizing a public health problem. The major consequences reported in literature were damage to the central nervous system, cancer, deleterious effects on rural workers' health, intoxications, malformations, and endocrine changes. These findings point out the need to understand the impact of chronic exposure to pesticides on severely exposed people and highlight the importance of creating public policies to protect them and avoid disease occurrence.

COVID-19: The question of genetic diversity and therapeutic intervention approaches.

Coronavirus disease 2019 (COVID-19), caused by the Severe Acute Respiratory Syndrome Coronavirus type 2 (SARS-CoV-2), is the largest pandemic in modern history with very high infection rates and considerable mortality. The disease, which emerged in China's Wuhan province, had its first reported case on December 29, 2019, and spread rapidly worldwide. On March 11, 2020, the World Health Organization (WHO) declared the COVID-19 outbreak a pandemic and global health emergency. Since the outbreak, efforts to develop COVID-19 vaccines, engineer new drugs, and evaluate existing ones for drug repurposing have been intensively undertaken to find ways to control this pandemic. COVID-19 therapeutic strategies aim to impair molecular pathways involved in the virus entrance and replication or interfere in the patients' overreaction and immunopathology. Moreover, nanotechnology could be an approach to boost the activity of new drugs. Several COVID-19 vaccine candidates have received emergency-use or full authorization in one or more countries, and others are being developed and tested. This review assesses the different strategies currently proposed to control COVID-19 and the issues or limitations imposed on some approaches by the human and viral genetic variability.

Prevalence and factors associated to cervical changes in units from the Single Health System / Prevalencia y factores asociados a las alteraciones cervicales en unidades del Sistema Único de Salud / Prevalência e fatores associados às alterações cervicais em unidades do Sistema Único de Saúde

ABSTRACT Objective: To estimate the prevalence and risk factors associated with cytopathological changes in the uterine cervix of women treated by the Unified Health System. Method: This is a cross-sectional study carried out with 350 women, between 14 and 79 years old who underwent pap smear tests in heath units in Francisco Beltrão, Paraná. Cervical cytopathological analyses and a questionnaire were applied to obtain socioeconomic information, as well as data on sexual behavior, gynecological aspects, and life habits. Chi-square test and logistic regression with p <0.05 were applied for statistical analysis. Results: The prevalence of cervical changes was 3.4% and the main categories found were low-grade cervical intraepithelial lesion, high-grade cervical intraepithelial lesion, and atypical cells of undetermined significance. From these, the first were present in 16.6% of women under 25 years old. The multivariate analysis pointed at associations between previous results of the cytopathology test (OR = 25.693), smoking (OR = 7.576), and oral contraceptives (OR = 5.265) and the outcome. Conclusion: Women with a history of previous cervical cytopathological abnormality, use of oral contraceptives, and smokers were more likely to have an abnormal result in the pap smear test.

RESUMEN Objetivo: estimar la prevalencia y los factores de riesgo asociados con las alteraciones citopatológicas en cuello uterino de mujeres atendidas por el Sistema Único de Salud. Método: Estudio transversal realizado con 350 mujeres, entre 14 y 79 años, que se sometieron a una prueba de Papanicolaou en unidades de salud de Francisco Beltrão, Paraná. Se realizó análisis citopatológicos cervicales y se aplicó un cuestionario para obtener informaciones socioeconómicas, ginecológicas, sobre conducta sexual y hábitos de vida. La prueba de chi-cuadrado y la regresión logística con p <0.05 fueron aplicadas para el análisis estadístico. Resultados: La prevalencia de alteraciones cervicales fue del 3,4% y las principales categorías encontradas fueron lesión intraepitelial de bajo grado, lesión intraepitelial de alto grado y atipias de significado indeterminado. De estos, el primero estuvo presente en el 16,6% de las mujeres menores de 25 años. El análisis multivariante señaló asociaciones entre el resultado citopatológico previo (OR = 25.693), el tabaquismo (OR = 7.576) y el consumo de anticonceptivos (OR = 5.265) con el resultado. Conclusión: Las mujeres con antecedentes de alteraciones cervicales previas, uso de anticonceptivos orales, y fumadoras tienen más probabilidades de alterar el cuello uterino.

RESUMO Objetivo: Estimar a prevalência e fatores de risco associados as alterações citopatológicas do colo uterino de mulheres atendidas pelo Sistema Único de Saúde. Método: É um estudo transversal com 350 mulheres de 14 a 79 anos que realizaram exame Papanicolau em unidades de saúde de Francisco Beltrão, Paraná. Realizou-se análise citopatológica e aplicou-se um questionário com informações socioeconômicas, comportamento sexual, ginecológico e hábitos de vida. Para análise estatística foi feito teste Qui-quadrado e regressão logística (p<0,05). Resultados: Prevalência das alterações cervicais foi 3,4%, incluindo Lesão intraepitelial de baixo e alto grau e Atipias de significado indeterminado. Destas, a primeira teve 16,6% de frequência nas mulheres abaixo de 25 anos. A análise multivariada apontou associações entre resultado citopatológico anterior (OR=25,693), hábito de fumar (OR=7,576) e anticoncepcional (OR=5,265) com o desfecho. Conclusão: Mulheres com história de alteração cervical, uso de anticoncepcional e fumantes possuem maiores chances de alterações no colo uterino.

Associação entre polimorfismos no gene/receptor da leptina e obesidade: uma revisão de literatura / Association between polymorphisms in the leptin gene/receiver and obesity: a literature review

Mutações na leptina ou em seu receptor causam a denominada obesidade mórbida relacionada à deficiência de leptina congênita, capaz de ser revertida eficazmente pela terapia com leptina. Nesse sentido, o objetivo desse estudo foi realizar uma revisão integrativa da literatura relacionada a evidências de Associação entre polimorfismos no gene/receptor da leptina avaliados por meio da reação em cadeia de polimerase e presença de obesidade. Foram incluídos artigos publicados em língua portuguesa, inglesa e espanhola, na íntegra, entre 2009 e 2019, que respondessem a problemática da pesquisa. A busca deu-se nas bases de dados: SCIELO, PUBMED e LILACS, a partir dos descritores PCR, Leptin, Obesity; a amostra final foi constituída de 09 artigos. Concluiu-se que polimorfismos no gene codificador/receptor desse hormônio regulador da ingestão de alimentos e energia metabólica podem ser um dos mais promissores candidatos no que diz respeito a biomarcadores da obesidade. (AU)

Mutations in leptin or in its receptor cause morbid obesity related to congenital leptin deficiency that can be effectively reversed with leptin therapy. In this sense, the aim of the study is to perform an integrative literature review related to evidence of the association between gene/leptin receptor polymorphisms, evaluated through polymerase chain reaction, and the presence of obesity. Publications in Portuguese, English and Spanish, in full, between 2009 and 2019, which responded to the research problem were included. The search was made in the following databases: SCIELO, PUBMED and LILACS, using the descriptors PCR, Leptin, Obesity; the final sample consisted of 09 articles. It is concluded that polymorphisms of coding gene/receptor of this food intake regulating hormone and metabolic energy may be more promising candidates for a biological risk of obesity. (AU)

Molecular characterization of the invasive aquatic macrophyte Hydrilla verticillata (Hydrocharitaceae) in Brazil.

Invasive populations of macrophytes are widely distributed and have been successfully introduced and established in freshwater habitats. Hydrilla verticillata was first recorded in 2005 in the Upper Paraná River floodplain and in 2007 at the Itaipu Reservoir (Brazil-Paraguay border, ca. 300 km downstream from its first record). However, its genetic variability within different sites in South America is unknown. We used nucleotide sequences corresponding to the trnL-trnF fragment cpDNA to genetically characterize populations of H. verticillata in different ecosystems of the Upper Paraná River basin. The results indicated an absence of genetic differentiation within and between populations of the basin, and even individuals collected 600 km apart belonged to the same haplotype. Moreover, H. verticillata populations of the Upper Paraná River basin also matched the dioecious biotype haplotype of the Southern United States and Asia. The identification of this single haplotype suggests that one founder genotype was introduced and established successfully in the Upper Paraná River basin, then, as a consequence of vegetative reproduction and the dispersal of propagules, spread to different habitats. However, firm conclusions about this inference can only be obtained with markers of biparental inheritance.

Characteristics associated with anti-HCV serological markers in prisoners in the state of Paraná, Brazil: a case-control study.

BACKGROUND: The prison system in Paraná, Brazil, is experiencing serious problems related to the increasing number of prisoners. Control of hepatitis C virus (HCV) has become more intense because the incarcerated population is considered a high-risk group for contagious diseases due to the favorable conditions found in prisons for the spread of these morbidities. The objective of this study was to identify features associated with hepatitis C infection among male prisoners in correctional institutions of Paraná state, Brazil. METHODS: This was a case-control study (27 cases and 54 controls) of men incarcerated in 11 penitentiaries in Paraná, Brazil. Information was obtained through a questionnaire in a cross-sectional epidemiological survey on HCV infection during the period from May 2015 to December 2016. Eligible men were recruited after testing positive for anti-HCV antibodies. Cases and controls were selected based on serological results of enzyme-linked immunosorbent assays and were matched by age, location of the penitentiary, and time in prison. Logistic regression analysis was used to identify risk factors for HCV seropositivity. RESULTS: The main significant independent risk factor for the acquisition of HCV infection was the use of injectable drugs (OR = 4.00; 95%CI:1.41-11.35; p < 0.001). CONCLUSIONS: This study provides evidence that HCV infection is associated with drug use by this population. This information is pivotal for tailoring prevention programs and guiding specific socioeducational measures that aim to reduce or prevent HCV transmission within the prison setting.

Characteristics associated with anti-HCV serological markers in prisoners in the state of Paraná, Brazil: a case-control study

ABSTRACT Background: The prison system in Paraná, Brazil, is experiencing serious problems related to the increasing number of prisoners. Control of hepatitis C virus (HCV) has become more intense because the incarcerated population is considered a high-risk group for contagious diseases due to the favorable conditions found in prisons for the spread of these morbidities. The objective of this study was to identify features associated with hepatitis C infection among male prisoners in correctional institutions of Paraná state, Brazil. Methods: This was a case-control study (27 cases and 54 controls) of men incarcerated in 11 penitentiaries in Paraná, Brazil. Information was obtained through a questionnaire in a cross-sectional epidemiological survey on HCV infection during the period from May 2015 to December 2016. Eligible men were recruited after testing positive for anti-HCV antibodies. Cases and controls were selected based on serological results of enzyme-linked immunosorbent assays and were matched by age, location of the penitentiary, and time in prison. Logistic regression analysis was used to identify risk factors for HCV seropositivity. Results: The main significant independent risk factor for the acquisition of HCV infection was the use of injectable drugs (OR = 4.00; 95%CI:1.41-11.35; p < 0.001). Conclusions: This study provides evidence that HCV infection is associated with drug use by this population. This information is pivotal for tailoring prevention programs and guiding specific socioeducational measures that aim to reduce or prevent HCV transmission within the prison setting.