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Detection of Toxocara eggs in contaminated soil from various public places of Chennai city and detailed correlation with literature

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Abstract

Toxocarosis is one of the most prevalent human helminthosis caused by larvae of Toxocara canis and Toxocara cati, the most widely distributed nematode parasites of dogs and cats respectively. Soil is considered as the principal source of transmission of Toxocara infection to human beings. With increasing population of dogs and cats, soil contamination with ova or eggs of Toxocara can be detected in public and private locations of city backyards, playgrounds, streets, sand pits and so on, regardless of the season of the year. In this context the present study was carried out to estimate the extent of soil contamination with Toxocara eggs in public parks, playgrounds and few kennels situated in different parts of Chennai city. A total of 105 soil samples from 40 public places and 5 kennels were screened for the presence of parasitic eggs. Toxocara eggs were recovered from 5 soil samples indicating an overall prevalence rate of 4.75 %. Out of 80 samples collected from public places, three samples, one each from Mogappair, My lady park (Periamet) and Madras Veterinary College showed the presence of Toxocara spp. eggs indicating an overall prevalence of 3.75 per cent. Out of the 25 samples from 5 kennels, two samples one each from Tambaram and Thorappakkam kennels were positive for Toxocara eggs with prevalence of 8 per cent. Low prevalence of Toxocara eggs in soil samples of these areas can be attributed to the less population of pups, the carriers of adult worms and the active source of soil contamination. The progress made in ABC (animal birth control) programme carried out by both governmental and non-governmental organizations has contributed to reduction of birth rate in dogs and thereby reduced the chances of soil contamination with Toxocara eggs to a certain extent in Chennai city.

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Acknowledgments

The authors wish to thank the Dean, Madras Veterinary College, Chennai-600007 for providing necessary facilities. The research was funded by Tamil Nadu state council for science and technology under the project Detection of public health impact of Toxocara ova in Chennai” (Code No. MS. 01).

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  1. Department of Veterinary Parasitology, Madras Veterinary College, Chennai, 600007, Tamil Nadu, India

    Divyamol Thomas & N. Jeyathilakan

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Thomas, D., Jeyathilakan, N. Detection of Toxocara eggs in contaminated soil from various public places of Chennai city and detailed correlation with literature. J Parasit Dis 38, 174–180 (2014). https://doi.org/10.1007/s12639-012-0217-x

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