Hill Publishing Group | contact@hillpublisher.com

Hill Publishing Group

Location:Home / Journals / International Journal of Clinical and Experimental Medicine Research /


Study on Metacercarial Infection in Clarias lazera and Their Public Health Importance in Assiut City, Egypt

Youssef, T.H.1*, Hefnawy, Y.A.1, Khalifa, R.2, and Mahmoud, A.E.2

1Department of Food Hygiene, Faculty of Veterinary Medicine, Assuit University, Egypt.

2Department of Parasitology, Faculty of Medicine, Assuit University, Egypt.

*Corresponding author: Youssef, T.H.Department of Food Hygiene, Faculty of Veterinary Medicine, Assuit University, Egypt.

PDF Downloads
Date: April 22,2020 Hits: 387, How to cite this paper


A study of helminth parasites of Clarias lazera in Assiut city, Egypt was carried out. A total of 50 Clarias lazera were collected live from Nile River at Assiut city, Egypt in the period between April 2014 to April 2015. Adult flukes were obtained from Albino rats experimentally infected with the metacercariae at day 7 post-infection. Overall prevalence of infection was 92%.The highest incidence percentage of encysted metacercariae in examined Clarias lazera fishes was detected in the posterior region (93.47%), moderate distribution was detected in the middle part with a percentage of 71.73% while the lowest distribution was recorded in the anterior part (43.7%); these data were found statistically significant (p level<0.01). The prevalence of encysted metacercariae (EMC) was higher during Summer (81.8%), followed by Spring (78.1%), Autumn (60%) and Winter (53.4%). In Conclusion, 92% of examined C. lazera fishes were infested with EMC.


[1] Aken'ova, A.A. (2000). Copepod parasites of the gills of Clarias gariepinus in two lakes in a river in Zaria. Nig. J. Parasitol., 20: 99–112.

[2] Eissa, I.A.M., Diab, A.S., and Badran, A.F. (1996). Studies on some internal parasitic diseases among wild and cultured Oreochromis niloticus fish. 7th Sci. Cong., 17-19. Nov. 1996, Fac. Vet. Med., Assiut, Egypt.

[3] Mohamed, I.B. (1996). Pathological changes in some fish eating mammals as a result of consumption of fish infested with encysted metacercariae. PhD Thesis, (Pathology), Fac. Vet. Med., Cairo Univ.

[4] Kostadinova, A. and Pérez-del-Olmo, A. (2014). The systematics of the Trematoda. Digenetic Trematodes, Springer, 21-44.

[5] Ikechukwu, I., Solomon, R., and Wilfred-Ekprikpo, P. (2017). Endoparasites found in Cl. gariepinus (Clariidae) that are found in Kubwa Market.

[6] El-Mossalami, E. and Sherif, I.H. (1964). Encysted metacercariae in muscles of Clarias lazera (Armout catfish). Cylon vet. J., 12(3): 50-53.

[7] Derwa, H.I.M., Youssef, Y.M., Dessoki, A.A., Ali, A.G., and EL-lamie M.M. (2019). Diseases Resulting from Trematode Infestations in Oreochromis niloticus and Clarias gariepinus in Ismailia Governorate. Suez Canal Veterinary Medicine Journal. 24(2):159-175.

[8] Riad, R.M. (1992). Helminth parasites of freshwater fish and their public health importance. M.V.SC. Thesis, Meat and Fish Hygiene. Fac.Vet. Med. Assuit Univ.

[9] El-Shahawy, I., El-Seify, M., Metwally, A., and Fwaz, M. (2017). Survey on endoparasitic fauna of some commercially important fishes of the River Nile, southern of Egypt (Egypt). Revue De Medecine Veterinaire 168: 126-134.

[10] El-Sherbiny, M.M.T. (1987). Parasites in market fish and its public health importance. M.V.Sc. Thesis, Cairo University.

[11] Saad, M.S., Salem, A.M., Mahdy, O.A. and Ibrahim, E.S. (2019). Prevalence of metacercarial infection in some marketed fish in Giza Governorate, Egypt. Journal of the Egyptian Society of Parasitology. 49(1): 129 – 134.

[12] Abdallah, K.F., Hamadto, H.H., El-Hayawan, I.A., Dawoud, H.A., Negm-Eldin, M. and Waleed El-Awamy, A. (2009). Metacercariae recovered from fresh-water fishes in the vicinity of Qualkyobia Governorate, Egypt. J. Egypt. Soc. Parasitol. 39(2): 467 – 477.

[13] Kirrella, G.A., Elhawary, N.M., Bazh, E.K., Sorour, S.S. and El-Dakhly, K.M. (2018). Oreochromis niloticus and Clarias gariepinus Fish Infected with Digenean Metacercariae: Experimental Infection of Puppies and Some Chemical Alterations in Fish. Asian Journal of Animal and Veterinary Advances. 13(4): 352-359.

[14] Saleh, R.S., Abou-Eisha, A.M., Fadel, H.M., and Helmy, Y.A. (2009). Occurrence of encysted metacercariae of some zoonotic trematodes in freshwater fishes and their public health significance in Port Said province. Proceedings of the 2nd Global Fisheries and Aquaculture Research Conference, Cairo International Convention Center, 24-26 October 2009: 341-351.

[15] Elsheikha, H.M. and Elshazly, A.M. (2008). Host-dependent variations in the seasonal prevalence and intensity of heterophyid encysted metacercariae (Digenea: Heterophyidea) in brackish water fish in Egypt. Vet. Parasitol. 153(1-2): 65-72.

[16] El-Mokadem, A. (1982). The prevalence of heterophyids in man, animals and various fish host in Edko area. M.Sc. Thesis, Public Health, High Inst. P.H.P. Alexandria University.

Full-Text HTML

Study on Metacercarial Infection in Clarias lazera and Their Public Health Importance in Assiut City, Egypt

How to cite this paper: Youssef, T.H., Hefnawy, Y.A., Khalifa, R., and Mahmoud, A.E. (2020Study on Metacercarial Infection in Clarias lazera and Their Public Health Importance in Assiut City, Egypt. International Journal of Clinical and Experimental Medicine Research, 4(2), 13-17.

DOI: http://dx.doi.org/10.26855/ijcemr.2020.04.002

Volumes(Year) & Month

Free HPG Newsletters

Add your e-mail address to receive free newsletters from Hill Publishing Group.

Contact us

Hill Publishing Group

8825 53rd Ave

Elmhurst, NY 11373, USA

E-mail: contact@hillpublisher.com

Copyright © 2019 Hill Publishing Group Inc. All Rights Reserved.