Prevalence of heterophyiosis in Tilapia fish and humans in Northern Egypt (original) (raw)

Abstract

A total of 100 Tilapia fish samples were collected from brackish water (n = 50) and fresh water (n = 50) resources, Northern Egypt, and examined for heterophyid encysted metacercariae (EMC) during the period from August 2007 to July 2008. The overall prevalence of infection was 32%; 22% for brackish water fish and 42% for fresh water fish. Significant differences in parasite occurrence among body regions were found, with muscles of the tail and caudal third being highly affected (93.4%) followed by middle third (84.3%) and anterior third (75%), while the head region had the lowest infection (21.9%). The prevalence was highest in summer season (46.4%) followed by spring (37.5%) and autumn (27.3%), and was lowest in winter (15.4%). The prevalence of infection decreased as fish size increased. Adult heterophyids, Heterophyes heterophyes, Heterophyes aequalis, Pygidiopsis genata, Haplorchis yokogawai, and Ascocotyle (Phagicola) ascolonga were recovered from EMC-feed puppies. Eggs of heterophyid type were detected in 10 (13.3%) out of 75 human stool specimens from local residents. An association exists between being a female (odd ratio [OR] 1.59 and 95% confidence interval [CI] 0.42–6.04), a fisherman (OR 1.39 [95% CI 0.26–7.48]), a housewife (OR 1.24 [95% CI 0.29–6.28]), 15–45 years old (OR 2.22 [95% CI 0.58–8.53]), or aged 5–14 years (OR 1.29 [95% CI 0.30–5.58]) and heterophyid infection. Measures should be implemented to reduce the risk of transmission of heterophyids to human and fish-eating animals.

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Acknowledgement

The authors are grateful to Dr Aurélien Madouasse from The University of Nottingham for providing the statistical analysis.

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Authors and Affiliations

1. Department of Zoonoses, Faculty of Veterinary Medicine, Benha University, Benha, Egypt
   Salem M. A. Lobna
2. Department of Hygiene, Animal Behavior and Management, Faculty of Veterinary Medicine, Benha University, Benha, Egypt
   Y. F. Metawea
3. The School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD, UK
   Hany M. Elsheikha

Authors

1. Salem M. A. Lobna
2. Y. F. Metawea
3. Hany M. Elsheikha

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Correspondence toHany M. Elsheikha.

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Lobna, S.M.A., Metawea, Y.F. & Elsheikha, H.M. Prevalence of heterophyiosis in Tilapia fish and humans in Northern Egypt.Parasitol Res 107, 1029–1034 (2010). https://doi.org/10.1007/s00436-010-1976-x

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• Received: 18 March 2010
• Accepted: 05 July 2010
• Published: 20 July 2010
• Issue date: September 2010
• DOI: https://doi.org/10.1007/s00436-010-1976-x

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