Publication: Natural parasitic infection of the golden apple snail, Pomacea canaliculata.
Issued Date
1993-03-01
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ISSN
01251562
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2-s2.0-0027571645
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Mahidol University
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SCOPUS
Bibliographic Citation
The Southeast Asian journal of tropical medicine and public health. Vol.24, No.1 (1993), 170-177
Suggested Citation
R. S. Keawjam, P. Poonswad, E. S. Upatham, S. Banpavichit Natural parasitic infection of the golden apple snail, Pomacea canaliculata.. The Southeast Asian journal of tropical medicine and public health. Vol.24, No.1 (1993), 170-177. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/22736
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Title
Natural parasitic infection of the golden apple snail, Pomacea canaliculata.
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Abstract
Golden apple snails, Pomacea canaliculata, were collected once a month during a year to search for their natural parasites. The collections were made at two localities having different ecological environments. Of 576 collected snails from a canal, 176 individuals (30.6%) were infected by three groups of metacercariae. These parasites were amphistome, distome and echinostome metacercariae, which had prevalences of 23.5, 19.5 and 0.5%, respectively. The incidence of infection was highest (68.4% in October) when the snail population was composed of the old, juvenile and young Pomacea. Amphistome metacercariae were found most frequently and echinostome metacercariae the least frequently; both parasites were localized in the foot muscle of the snails and had a Shannon index of zero. The range of amphistomes was 1 to 115 with the mean +/- SD of 1 +/- 2 and 95% CL of 1, 2. Distome metacercariae were found primarily in the heart (range: 1-13), and also in the foot muscle (range: 1-5) and kidney (range: 1-14), with a Shannon index of 0.4. The means +/- SD (with 95% CL) were 3 +/- 4 (95% CL = 1, 5), 3 +/- 4 (95% CL = 2, 4) and 2 +/- 1 (95% CL = 1, 2) for the foot muscle, heart and kidney, respectively. The snails from a pond, another locality, had a low proportion of infected individuals. Of 605 snails, only 24 individuals (4.0%) were infected, with the prevalence of amphistomes, distomes and echinostomes being 0.8, 1.8 and 2.1%, respectively. The incidence of infection for each month was zero or less than 10%, except in May when it was 30.2%.