The Biology And Ecology Of Schistosoma Spindale In Relation To The Epidemiology Of Cercarial Dermatitis In Peninsular Malaysia
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Date
1999-04
Authors
Muthusamy, Krishnasamy
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Abstract
The objective of this study was to study various factors that contributed to the
epidemiology of cercarial dermatitis caused by Schistosoma spindale in
peninsular Malaysia, with particular focus on an endemic area in Labu, Negri
Sembi Ian.
S. spindale was incriminated as the causative agent in the outbreak of cercarial
dermatitis at the 8th Km Labu Road, Negri Sembi Ian. Out of 9 species of snails
examined, only I. exustus was positive for S. spindale with a 16.69% infection
rate. A social profile survey of the affected residents of this area showed that
the paddy farmers discontinued rice planting for two seasons because of the
dermatitis. Of the 30 adults surveyed, 21 people showed signs of dermatitis. A
majority of the adults surveyed (77%) were paddy farmers, aged between 15-64
years old.
A study of 6472 snails collected throughout peninsular Malaysia revealed that
out of the 11 species of snails collected, cercariae of S. spindale were found
only in Indoplanorbis exustus. In this study, Johore, Trengganu and Kedah
were identified as new localities for the presence of S. spindale in I. exustus.
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Keywords
Schistosoma Spindale , Cercarial Dermatitis