A comparative cross-sectional study on the prevalence and morbidity of schistosomiasis in a community in northeastern Brazil (1979-2010)

Abstract

A cross-sectional study on the prevalence and morbidity of schistosomiasis was conducted in the main settlement of the municipality of Alhandra, in the southern coastal region of the state of Paraíba, in 2010. The results of this study were compared with the results of a previous study conducted in the same area in 1979. The systematic sampling per family conglomerate included approximately 10% of the resident population in the urban area of Alhandra. Faecal examinations were performed using the Kato-Katz method. The clinical forms of the disease were classified in accordance with FS Barbosa as Type I - intestinal form, Type II - hepatointestinal form and Type III - hepatosplenic form. The prevalence of the infection in 2010 was 10.05%, whereas in 1979 it was 46.6% among untreated patients. The percentages of the three clinical forms in 2010 were as follows: 95.3% Type I, 4.6% Type II and 0% Type III; in 1979, the percentages were 94.4%, 3% and 2.6% for Types I, II and III, respectively. In 1979, 6.07% of the Biomphalaria glabrata specimens (the intermediate host in this area) excreted cercariae, where in 2010 only 1.27% of the specimens caught excreted the parasite.

Systematic review and meta-analysis on Schistosoma mansoni infection prevalence, and associated risk factors in Brazil

“…The 27 remaining studies were then divided into four distinct subgroups: (1) analysis of prevalence in different stages of implementation of control programs (Burlandy-Soares et al 2003; Vasconcelos et al 2009; Igreja et al 2010; Barbosa et al 2011; Sarvel et al 2011; Melo et al 2014), (2) comparison of the prevalence of S. mansoni using different methods of laboratory diagnosis (Teles et al 2003; Mendes et al 2005; Enk et al 2008; Siqueira et al 2011; Espirito-Santo et al 2014 a , b ), (3) evaluation of the prevalence of S. mansoni and predictors associated with infection (Bina and Prata, 2003; Massara et al 2004; Couto, 2005; Goncalves et al 2005; Gazzinelli et al 2006; Enk et al 2010; Barbosa et al 2013; Gomes et al 2014; Blanton et al 2015) and (4) analysis of the prevalence of S. mansoni among schoolchildren (Rocha et al 2000; Barbosa et al 2006; Brito et al 2006; Guimaraes and Tavares-Neto, 2006; Massara et al 2006; Palmeira et al 2010).…”

“…Three studies were survey-type studies (Burlandy-Soares et al 2003; Barbosa et al 2011; Sarvel et al 2011). Two were prevalence-type studies (Vasconcelos et al 2009; Igreja et al 2010), and one was a cross-sectional study (Melo et al 2014). The Kato-Katz technique was used either alone or combined with other methods for laboratory diagnosis.…”

“…The Kato-Katz technique was used either alone or combined with other methods for laboratory diagnosis. As for the age group, only four publications reported the minimum and maximum age of the population, 0–90 years old (Burlandy-Soares et al 2003; Vasconcelos et al 2009; Igreja et al 2010; Melo et al 2014). Four of the six studies performed statistical analyses (Burlandy-Soares et al 2003; Vasconcelos et al 2009; Barbosa et al 2011; Sarvel et al 2011).…”

Parasitological diagnosis in fecal samples in the Laboratory of Clinical Analyzes: comparison of techniques and cost of implantation

“…Além desses fatores, cabe lembrar que tem sido observado por vários autores (30,31) uma manutenção ou aumento da frequência de protozoários com redução de frequência de helmintos, o que também reforça a não adequação do uso do Kato-Katz como técnica única na rotina do diagnóstico de parasitos intestinais, ainda que em pesquisa de campo e reforçado pelo índice de concordância baixo com as demais técnicas.…”

Perfil epidemiológico da esquistossomose mansônica em Minas Gerais

“…2019. ISSN 2317-2460 faixa etária com maior positividade foi de 41 a 50 anos, em que pese que o maior número de amostras foi na faixa de 11 a 20 anos, porém com menor positividade (10,1%) (10) .…”