The distribution of Biomphalaria spp. in different habitats in relation to physical, biological, water contact and cognitive factors in a rural area in Minas Gerais, Brazil

Kloos, Helmut; Souza, Cecília de Fátima; Gazzinelli, Andréa; Filho, Britaldo Silveira Soares; Temba, Plínio da Costa; Bethony, Jeffrey M.; Page, Kristen M.; Grzywacz, Claudia; Lewis, Fred A.; Minchella, Dennis J.; LoVerde, Philip T.; Correa-Oliveira, Rodrigo

doi:10.1590/s0074-02762001000900008

Cited by 49 publications

(44 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…glabrata is typically found in shallow water tropical habitats (Kloos et al 2001) and therefore is exposed to the consistently high levels of UVB that occur at lower latitudes (Johnson et al, 1976;Kerr et al, 2003;Madronich et al, 1998). Our results suggest that UVB stress could potentially influence the prevalence of schistosome infection by affecting the survival and health of the snail intermediate host.…”

Section: Morphological Abnormalitiesmentioning

confidence: 61%

Lethal and sub-lethal effects of UVB on juvenile Biomphalaria glabrata (Mollusca: Pulmonata)

Ruelas¹,

Karentz²,

Sullivan³

2006

Journal of Invertebrate Pathology

View full text Add to dashboard Cite

Although Schistosoma mansoni occurs mainly in the tropics, where intense levels of solar radiation are present, the impact of ultraviolet (UV) light on schistosome transmission is not known. The purpose of this study was to investigate potential effects of UVB (290-320 nm) on juvenile Biomphalaria glabrata, the snail intermediate host of S. mansoni. Albino and wild type snails were exposed to doses of UVB from UV-fluorescent lamps, and the following were measured: survival, photoreactivation (light-mediated DNA repair), effects on feeding behavior, and morphological tissue abnormalities. Irradiation with UVB is lethal to B. glabrata in a dose-dependent manner. Exposure to white light subsequent to UVB irradiation enhances survival, probably by photoreactivation. The shell offers some, but not complete, protection. Experiments in which UVB transmittance through the shell was blocked with black nail polish suggest that injury to both exposed (headfoot) and shell-enclosed (mantle and visceral mass) tissues contributes to mortality in lethallyirradiated snails. Wild-type (pigmented) snails are less susceptible to lethal effects of UVB than albino snails, and they may be more capable of photoreactivation. UVB exposure inhibits snail feeding behavior, and causes tentacle forks and growths on the headfoot. Thus, UVB may influence the life cycle of S. mansoni by both lethal and sub-lethal damage to the snail intermediate host.However, the ability of snails to photoreactivate may mitigate these effects.

show abstract

Section: Morphological Abnormalitiesmentioning

confidence: 61%

Lethal and sub-lethal effects of UVB on juvenile Biomphalaria glabrata (Mollusca: Pulmonata)

Ruelas¹,

Karentz²,

Sullivan³

2006

Journal of Invertebrate Pathology

View full text Add to dashboard Cite

show abstract

“…While factors such as dispersion by floods, plants, aquarium fish shipment, and aquatic birds' migration are linked to the widespread distribution of this intermediate host, other environmental factors regulate their abundance and establishment in new areas. Although these snails can tolerate variations in physical, chemical and biological parameters in the environment where they live (Kloos et al, 2001;Utzinger et al, 1997;Woolhouse, 1992), there is a threshold limit for this tolerance. Several biotic and abiotic factors in the environment control Biomphalaria abundance and distribution (Brown, 1994;Rollinson, 2011).…”

Section: Introductionmentioning

confidence: 99%

Predicting the spatial distribution of Biomphalaria straminea, a potential intermediate host for Schistosoma mansoni, in China

Habib

Guo

et al. 2016

Geospat Health

View full text Add to dashboard Cite

Schistosomiasis is one of the most prevalent parasitic diseases impacting human health in the tropics and sub-tropics. The geographic distribution of Schistosoma mansoni, the most widespread species, includes areas in Africa, the Middle East, South America and the Caribbean. Snails of the genus Biomphalaria act as intermediate host for S. mansoni. Biomphalaria straminea is not indigenous in China but was accidentally introduced to Hong Kong from South America and has spread to other habitats in the southern parts of the country. This species is known for its great dispersal capacity that highlights the importance of the snail as a potential host for S. mansoni in China. In this connection, although no such infection has been recorded in the field so far, the continuous expansion of China's projects in endemic areas of Africa and import of the infection via returning workers or visitors deserve attention. The purpose of this study was to map and predict the spatial distribution of B. straminea in China. Snail occurrence data were assembled and investigated using MaxEnt software, along with climatic and environmental variables to produce a predictive risk map. Of the environmental variables tested, the precipitation of warmest quarter was the most contribution factor for snail's spatial distribution. Risk areas were found in southeastern China and it is expected that they will guide policies and control programmes to potential areas area of snail abundance and used for spatial targeting of control interventions for this invasive species.

show abstract

“…*Significant correlation based on 95% confidance interval or 95% Bayesian credible interval. (Foster, 1964;Appleton, 1978;Kloos et al, 2001;Malone, 2005;McCreesh and Booth, 2014). A possible explanation for the observed higher prevalences of S. mansoni infection in the lower parts of the mountainous Tonkpi region may be the favourable temperature and velocity of rivers for B. pfeifferi (Shiff and Husting, 1966).…”

Section: Discussionmentioning

confidence: 99%

The spatial distribution of Schistosoma mansoni infection in four regions of western Côte d’Ivoire

et al. 2015

View full text Add to dashboard Cite

Schistosomiasis poses a considerable public health burden in subSaharan Africa and a sound understanding of the spatial distribution facilitates to better target control interventions. The objectives of this study were i) to assess the prevalence of Schistosoma mansoni among school-aged children in four regions of western Côte d'Ivoire; ii) to determine demographic, climatic and environmental factors that influence the distribution of S. mansoni; and iii) to map and predict the distribution of S. mansoni in non-sampled locations. Parasitological surveys were carried out in 264 schools from June to December 2011. In each school, we aimed to examine 50 children for S. mansoni infection using duplicate Kato-Katz thick smears. Schools were georeferenced using a hand-held global positioning system receiver. Demographic data were obtained from readily available school lists, while climatic and environmental data were extracted from open-access remote sensing databases. Multivariable, binary non-spatial models and a Bayesian geostatistical logistic regression model were used to identify demographic, climatic and environmental risk factors for S. mansoni infection. Risk maps were developed based on observed S. mansoni prevalences and using Bayesian geostatistical models to predict prevalences at non-sampled locations. Overall, 12,462 children provided a sufficiently large stool sample to perform at least one Kato-Katz thick smear. The observed overall prevalence of S. mansoni infection was 39.9%, ranging from 0 to 100% at the unit of the school. Bayesian geostatistical analysis revealed that age, sex, altitude and difference between land surface temperature at day and night were significantly associated with S. mansoni infection. The S. mansoni risk map presented here is being been used by the national schistosomiasis control programme for spatial targeting of praziquantel and other interventions.

show abstract

The distribution of Biomphalaria spp. in different habitats in relation to physical, biological, water contact and cognitive factors in a rural area in Minas Gerais, Brazil

Cited by 49 publications

References 8 publications

Lethal and sub-lethal effects of UVB on juvenile Biomphalaria glabrata (Mollusca: Pulmonata)

Lethal and sub-lethal effects of UVB on juvenile Biomphalaria glabrata (Mollusca: Pulmonata)

Predicting the spatial distribution of Biomphalaria straminea, a potential intermediate host for Schistosoma mansoni, in China

The spatial distribution of Schistosoma mansoni infection in four regions of western Côte d’Ivoire

Contact Info

Product

Resources

About