Trematode Fluke Procerovumvarium as Cause of Ocular Inflammation in Children, South India
Published Date:Feb 2016
Source:Emerg Infect Dis. 22(2):192-200.
Eye Infections, Parasitic
Molecular Sequence Data
Sequence Analysis, DNA
Trematode Fluke Procerovumvarium As Cause Of Ocular Inflammation In Children, South India
Pubmed Central ID:PMC4734527
Description:Trematodes are recognized as a group of emerging parasites in tropical countries. We identified a trematode as a cause of ocular granulomas that developed in children who bathed in ponds or rivers in South India. DNA was isolated from patients' surgically excised granulomas and from the trematode cercariae (larvae) released by the snail Melanoides tuberculata in water in which the children bathed. Real-time and conventional PCRs were performed that targeted ribosomal DNA regions spanning the internal transcribed spacer 2 and 28S sequences of this trematode. The PCR-amplified products were subjected to bidirectional sequencing. Analysis of sequences for the granuloma samples and the trematode cercariae showed maximum sequence similarity with Procerovum varium (family Heterophyidae). Our results confirmed the etiology of the ocular infection, implicating snail vectors as environmental risk factors for ocular parasitosis.
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