Esquistossomose em área de transição rural-urbana: reflexões epidemiológicas

Melo, Andrea Gomes Santana de; Melo, Cláudia Moura de; Oliveira, Cristiane Costa Cunha; Oliveira, Daniel Santos; Santos, Vanessa Bispo; Jeraldo, Verónica de Lourdes Sierpe

doi:10.4025/cienccuidsaude.v10i3.12479

Cited by 12 publications

(16 citation statements)

References 5 publications

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“…The identification of schistosomiasis transmission foci is crucial for the development of control and health management plans in these communities [ 31 ]. Based on the location of mollusks infected with S .…”

Section: Discussionmentioning

confidence: 99%

Socioenvironmental factors associated with Schistosoma mansoni infection and intermediate hosts in an urban area of northeastern Brazil

et al. 2018

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Schistosomiasis, which is caused by trematodes of the genus Schistosoma and by the species Schistosoma mansoni in Brazil, is transmitted primarily by Biomphalaria glabrata mollusks. Infections occur in humans and mollusks in freshwater environments contaminated with feces from infected humans. This study aimed to evaluate potential foci of schistosomiasis based on the identification of infection sites for the snails, factors that increased the human infection probability of S. mansoni infection, and the relationship of the disease with abiotic, biotic, and sociocultural factors. The study was conducted in an urban area on the northeast coast of Brazil; this location was chosen based on the following factors: the presence of B. glabrata, nearby freshwater, and the absence of sewer treatment. A parasitological analysis was performed to evaluate infections of the mollusks and residents inside the perimeter defined by the collection points. Questionnaires were applied to obtain demographic data and to identify behaviors that led to human infection. To verify the contamination of freshwater by human feces, a microbiological analysis of the water was performed at the mollusk collection points to determine the rate of contamination with fecal coliforms. A total of 10,270 B. glabrata mollusks were collected between August 2013 and August 2014, of which 8.8% were positive for S. mansoni; the prevalence ranged from 0 to 34.5% over the study period. A total of 232 coprological samples from the residents were analyzed. The S. mansoni infection prevalence rate was 16.4%, and the S. mansoni parasitic load in the infected residents was 54.9 eggs per gram of feces on average. Males were more affected by the parasite, especially in the 8-17-year-old age range. Thermotolerant coliforms were observed at the mollusk collection sites, which indicated that freshwater and sewage were in continuous contact. This contamination indicated poor sanitary conditions, as was previously observed, which could be combined with detrimental behavior due to the residents' habits. These conditions cause a predisposition for both intermediate and definitive infections of the hosts by creating a socioenvironmental scenario that is conducive to the formation and maintenance of potential schistosomiasis foci. This and similar areas deserve special attention from the government with an aim of improving sanitation services and local resident knowledge to prevent future contamination.

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Section: Discussionmentioning

confidence: 99%

Socioenvironmental factors associated with Schistosoma mansoni infection and intermediate hosts in an urban area of northeastern Brazil

et al. 2018

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“…34 The schistosomiasis was more prevalent between blacks and browns, this trend was found in individuals infected with S. mansoni. 14,28 The key element for the occurrence of this infection is not the ethnicity but the socio-economic factor: individuals of this ethnical group m more devoid of income and years of study and reside in places with environmental insalubrity. The deficiency of basic sanitation and the risk of infection have been documented by several authors [35][36][37][38] as well as the adequate sanitation and lesser chances of acquiring the infection by this parasite.…”

Section: Discussionmentioning

confidence: 99%

“…In the epidemiological research a form validated by Melo et al 14 was applied, containing the following variables: identification, sociodemographic (ethnicity, nationality, income, schooling, water supply and treatment and waste disposal, destination of the trash and housing type), autochthony and risk behavior of schistosomiasis (labor, household and leisure activities and frequency of contact with hydro solutions).…”

Section: Methodsmentioning

confidence: 99%

Schistosomiasis mansoni in families of fishing workers of endemic area of Alagoas

et al. 2018

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Objective: To analyze the epidemiological and clinical aspects involved in the transmission and manifestation of schistosomiasis in a community of fishermen from the endemic area of Alagoas. Methods: Epidemiological, transversal, prospective, descriptive, quantitative study. The coproparasitological survey included 275 family units of fish workers and the epidemiological and clinical ones, those with a positive diagnosis for S. mansoni. Results: The prevalence of schistosomiasis was 13.9% (fishermen), 2.1% (shellfish) and 2.1% (family members). The occurrence of the infection varied according to gender, age, ethnicity and socioeconomic status. Exposure occurred near the home. Autochthonous and predominant low parasite burden, intestinal clinical presentation, abdominal pain and diarrhea were observed. There were no nutritional and pressure changes associated with parasitosis. Adherence to drug therapy and use of the schistosomicidal drug was feared. Conclusion: Fish workers are at high risk for contracting the disease with clinical hepatointestinal manifestation, which requires more intense health actions.

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“…[10][11][12][13] The appearance of cases of the disease in urban areas is not evidence of local transmission of S. mansoni, as it may be the result of infected migrants coming from endemic areas. 6,11,13,14 Considering the existence of individuals infected with S. mansoni living in urban agglomerations with precarious basic sanitation systems, inadequate water supply and presence of the intermediate host, predictive conditions for the establishment of the cycle of this parasite can be identified. These factors have been reported in some urban and coastal locations of some Brazilian states.…”

Section: Introductionmentioning

confidence: 99%

Investigação sobre os casos e óbitos por esquistossomose na cidade do Recife, Pernambuco, Brasil, 2005-2013*

Oliveira¹,

Pimentel²,

Araujo³

et al. 2018

Epidemiologia e Serviços de Saúde

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Objective: to describe schistosomiasis cases and deaths among residents of the city of Recife, Pernambuco, Brazil, from 2005 to 2013. Methods: this was a descriptive epidemiological study using data from the Mortality Information System (SIM) (2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013) and the Notifiable Diseases Information System (SINAN) (2007)(2008)(2009)(2010)(2011)(2012)(2013); active tracing of the relatives of the dead was undertaken and probabilistic linkage of the databases (2007)(2008)(2009)(2010)(2011)(2012)(2013) was performed using the Reclink program. Results: 297 schistosomiasis deaths were recorded on the SIM system; through active tracing, 130 relatives were contacted and 20.8% autochthony was identified; 388 cases resident in Recife were registered on the SINAN system; through probabilistic linkage, 23 matching records were identified on SIM and SINAN. Conclusion: investigation of deaths showed that some individuals had never traveled outside Recife and progressed to the chronic stage of the disease; 23.8% of the cases registered on SINAN had Recife as the municipality in which infection occurred.

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Esquistossomose em área de transição rural-urbana: reflexões epidemiológicas

Cited by 12 publications

References 5 publications

Socioenvironmental factors associated with Schistosoma mansoni infection and intermediate hosts in an urban area of northeastern Brazil

Socioenvironmental factors associated with Schistosoma mansoni infection and intermediate hosts in an urban area of northeastern Brazil

Schistosomiasis mansoni in families of fishing workers of endemic area of Alagoas

Investigação sobre os casos e óbitos por esquistossomose na cidade do Recife, Pernambuco, Brasil, 2005-2013*

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