Relationships between nutrient enrichment, pleurocerid snail density and trematode infection rate in streams

2013 ◽  
Vol 58 (7) ◽  
pp. 1392-1404 ◽  
Author(s):  
Serena Ciparis ◽  
Deborah D. Iwanowicz ◽  
J. Reese Voshell
2013 ◽  
Vol 29 (2) ◽  
pp. 357-367 ◽  
Author(s):  
Onicio Batista Leal Neto ◽  
Elainne Christine de Souza Gomes ◽  
Fernando José Moreira de Oliveira Junior ◽  
Rafael Andrade ◽  
Diego Leandro Reis ◽  
...  

Schistosomiasis has expanded to the coast of Pernambuco State, Brazil, where there are frequent reports of Biomphalaria glabrata snails and human cases of the disease. This study analyzes factors related to schistosomiasis transmission risk in Porto de Galinhas. A one-year malacological survey was conducted to identify biological, abiotic, and environmental factors related to the host snail breeding sites. Data analysis used Excel 2010, GTM Pro, and ArcGis 10. A total of 11,012 B. glabrata snails were captured in 36 breeding sites, and 11 schistosomiasis transmission foci were identified. A negative correlation was found between breeding site temperature and snail density and infection rate, and a positive correlation with pH and salinity. The rainy season showed a positive correlation with snail density and infection rate. The study emphasizes the factors involved in the maintenance of schistosomiasis breeding sites, in light of persistence of this disease in Porto de Galinhas for more than 10 years.


2018 ◽  
Vol 46 (1) ◽  
pp. 69-76
Author(s):  
Anis Nurwidayati ◽  
Junus Widjaja ◽  
Samarang Samarang ◽  
Made Agus Nurjana ◽  
Intan Tolistiawaty ◽  
...  

AbstractSchistosomiasis in Indonesia only found in Napu and Bada Highlands, Poso district and Lindu Highlandsin Sigi district, Central Sulawesi Province. Schistosomiasis in Indonesia caused by Schistosoma japonicumand Oncomelania hupensis lindoensis is the intermediate snail host. The mapping of snail foci areas in2017 showed that there was a significant change in the spread of the snail's foci. This paper aimed todescribe the density and infection rate of S. japonicum cercariae in the snail host in the endemic areasof schistosomiasis in Central Sulawesi Province. The mean O.hupensis lindoensis snail density in Napuranged from 0.9 to 6.6/m2, with mean rates of cercariae infections ranging from 0.4% to 21.4%. The snaildensity average in Lindu ranging from 3/m2 to 69,1/m2, with 4.4%-72.9% of cercariae infections. In badathe snail density ranged from 0.1 to 4.9/m2, with mean rates of cercariae infections ranging from 0% to14.9%. Bivariate analysis showed there was no correlation between snail density and cercariae infectionrate with schistosomiasis case (p value> 0.05).Keywords : Schistosomiasis, density, infection rate, Oncomelania hupensis lindoensis, Central Sulawesi AbstrakSchistosomiasis di Indonesia hanya ditemukan di Propinsi Sulawesi Tengah, yaitu Dataran Tinggi Napudan Dataran Tinggi Bada, Kabupaten Poso serta Dataran Tinggi Lindu, Kabupaten Sigi. Schistosomiasisdi Indonesia disebabkan oleh Schistosoma japonicum dengan hospes perantara keong Oncomelaniahupensis lindoensis. Pemetaan daerah fokus pada tahun 2017 menunjukkan bahwa terdapat perubahanyang signifikan dalam penyebaran fokus keong. Tulisan ini bertujuan untuk menggambarkan kepadatandan infection rate serkaria S.japonicum pada keong perantara schistosomiasis di wilayah endemisschistosomiasis di Provinsi Sulawesi Tengah. Rerata kepadatan keong O.hupensis lindoensis di Napuberkisar dari 0,9 – 6,6/m2, dengan rerata tingkat infeksi serkaria berkisar antara 0,4% sampai 21,4%, diLindu kepadatan keong berkisar antara 3/m2 sampai 69,1/m2, dengan tingkat infeksi serkaria 4,4%¬72,9%,dan di Bada kepadatan keong berkisar antara 0,1 – 4,9/m2, dengan rerata tingkat infeksi serkaria berkisarantara 0 % sampai 14,9%. Analisis bivariat menunjukkan tidak ada korelasi antara kepadatan keong dantingkat infeksi serkaria dengan jumlah kasus schistosomiasis nilai p value > 0.05.Kata kunci: Schistosomiasis, kepadatan, tingkat infeksi, Oncomelania hupensis lindoensis, SulawesiTengah


ENTOMON ◽  
2019 ◽  
Vol 44 (3) ◽  
pp. 213-218
Author(s):  
Suresh Chand Kaushik ◽  
Sukhvir Singh ◽  
Purnima Srivastava ◽  
R. Rajendran

Detection of viruses in human sera particularly in endemic areas is cumbersome and laborious. Therefore, an alternative approach, Immuno-fluorescence assay (IFA) was performed to determine dengue virus (DENV) positivity in mosquitoes. A total of 1055 adult Aedes aegypti female mosquitoes were tested for IFA test against DENV. Minimum infection rate (MIR) for DENV was found higher during August to November 2016 ranging from 10.75 to 20.83. The average yearly MIR was about 6.64. Higher MIR for Ae. aegypti was found in Sarfabad, Noida (12.71) and Khoda Colony, Ghaziabad (11.90). Minimum MIR (4.67) was observed in Sanjay colony (Faridabad). The main contribution of this study resides in the development of a more suitable monitoring system for early detection of viral circulation and to prioritize early intervention in the non-transmission season.


Sign in / Sign up

Export Citation Format

Share Document