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Human intestinal schistosomiasis in communities living near three rivers of jimma town, South Western ethiopia.

Mengistu M, Shimelis T, Torben W, Terefe A, Kassa T, Hailu A - Ethiop J Health Sci (2011)

Bottom Line: The prevalence of S. mansoni was 26.3 % with intensity ranging 24 to 936 eggs per gram of stool.Biomphalaria snails collected from Chore and Awetu Rivers shaded higher rate of cercariae compared with Kito River.Treatment of targeted groups, appropriate health education and environmental measures (e.g. snail control) are needed to improve the situation.

View Article: PubMed Central - PubMed

Affiliation: Department of Medical Laboratory Science, Hawassa University, P. O. Box: 1560 Hawassa, Ethiopia.

ABSTRACT

Background: Schistosoma mansoni is one of the parasites with high public and medical importance in Ethiopia. However, information is scarce about S. mansoni epidemiology in people living with higher risk of infection in Jimma town. This study was designed to determine point prevalence, intensity and risk factors of S. mansoni infection among residents nearby three rivers of Jimma town and assess the rate of Biomphalaria species shading cercariae from January to April, 2007.

Methods: A cross-sectional study was conducted in communities residing nearby three rivers of Jimma town. Structured questionnaires were used to collect data on socio- demographic and behavioral risk factors. After physical examination, stool samples were collected from 517 study participants and processed with Kato-Katz technique for microscopic examination and quantification of egg load. Snails were collected for identification of Biomphalaria species and then checked for cercarial shading.

Results: The prevalence of S. mansoni was 26.3 % with intensity ranging 24 to 936 eggs per gram of stool. Participants in the age group 10-19 years, OR = 2.19 (95% CI; 1.10 - 4.34), and those living near the Awetu River, OR = 2.67 (95% CI; 1.06 - 6.75), had higher risk of S. mansoni infection. Moreover, water contact while crossing a river, OR = 3.77 (95% CI; 1.79 - 7.95), and swimming, OR = 2.59 (95% CI; 1.37 - 4.91, was significantly associated with infection. Biomphalaria snails collected from Chore and Awetu Rivers shaded higher rate of cercariae compared with Kito River.

Conclusion: A moderate prevalence of S. mansoni infection was shown in the study population. Infection rate among the residents correlated with rate of cercarial shading Biomphalaria snails. Treatment of targeted groups, appropriate health education and environmental measures (e.g. snail control) are needed to improve the situation.

No MeSH data available.


Related in: MedlinePlus

Rates of cercarial shading Biomphalaria snails and S. mansoni infection in residents nearby respective rivers in Jimma town, 2007.
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Figure 1: Rates of cercarial shading Biomphalaria snails and S. mansoni infection in residents nearby respective rivers in Jimma town, 2007.

Mentions: The rivers were observed to harbor snails of different genera and with varying degree of snail infestation. Among the rivers, Chore River was the most infested with Biomphalaria species. The cumulative rate of Biomphalaria species shading cercariae was 325 (58.0%). Rate of cercarial shading was observed to differ among the three rivers in which the highest rate was observed in snails collected from Chore River (Table 4). Trend in the rate of cercarial shading by Biomphalaria species coincides with rate of S. mansoni infection among residents nearby the corresponding river from where the snails were collected (figure 1).


Human intestinal schistosomiasis in communities living near three rivers of jimma town, South Western ethiopia.

Mengistu M, Shimelis T, Torben W, Terefe A, Kassa T, Hailu A - Ethiop J Health Sci (2011)

Rates of cercarial shading Biomphalaria snails and S. mansoni infection in residents nearby respective rivers in Jimma town, 2007.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3275858&req=5

Figure 1: Rates of cercarial shading Biomphalaria snails and S. mansoni infection in residents nearby respective rivers in Jimma town, 2007.
Mentions: The rivers were observed to harbor snails of different genera and with varying degree of snail infestation. Among the rivers, Chore River was the most infested with Biomphalaria species. The cumulative rate of Biomphalaria species shading cercariae was 325 (58.0%). Rate of cercarial shading was observed to differ among the three rivers in which the highest rate was observed in snails collected from Chore River (Table 4). Trend in the rate of cercarial shading by Biomphalaria species coincides with rate of S. mansoni infection among residents nearby the corresponding river from where the snails were collected (figure 1).

Bottom Line: The prevalence of S. mansoni was 26.3 % with intensity ranging 24 to 936 eggs per gram of stool.Biomphalaria snails collected from Chore and Awetu Rivers shaded higher rate of cercariae compared with Kito River.Treatment of targeted groups, appropriate health education and environmental measures (e.g. snail control) are needed to improve the situation.

View Article: PubMed Central - PubMed

Affiliation: Department of Medical Laboratory Science, Hawassa University, P. O. Box: 1560 Hawassa, Ethiopia.

ABSTRACT

Background: Schistosoma mansoni is one of the parasites with high public and medical importance in Ethiopia. However, information is scarce about S. mansoni epidemiology in people living with higher risk of infection in Jimma town. This study was designed to determine point prevalence, intensity and risk factors of S. mansoni infection among residents nearby three rivers of Jimma town and assess the rate of Biomphalaria species shading cercariae from January to April, 2007.

Methods: A cross-sectional study was conducted in communities residing nearby three rivers of Jimma town. Structured questionnaires were used to collect data on socio- demographic and behavioral risk factors. After physical examination, stool samples were collected from 517 study participants and processed with Kato-Katz technique for microscopic examination and quantification of egg load. Snails were collected for identification of Biomphalaria species and then checked for cercarial shading.

Results: The prevalence of S. mansoni was 26.3 % with intensity ranging 24 to 936 eggs per gram of stool. Participants in the age group 10-19 years, OR = 2.19 (95% CI; 1.10 - 4.34), and those living near the Awetu River, OR = 2.67 (95% CI; 1.06 - 6.75), had higher risk of S. mansoni infection. Moreover, water contact while crossing a river, OR = 3.77 (95% CI; 1.79 - 7.95), and swimming, OR = 2.59 (95% CI; 1.37 - 4.91, was significantly associated with infection. Biomphalaria snails collected from Chore and Awetu Rivers shaded higher rate of cercariae compared with Kito River.

Conclusion: A moderate prevalence of S. mansoni infection was shown in the study population. Infection rate among the residents correlated with rate of cercarial shading Biomphalaria snails. Treatment of targeted groups, appropriate health education and environmental measures (e.g. snail control) are needed to improve the situation.

No MeSH data available.


Related in: MedlinePlus