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Original Article 


Occurrence of Encysted Metacercariae in Tilapia Nilotica (Oreochromusniloticus) in Alexandria Province and their Public Health Significance

Neveen S Satour, Amany Farag Zayed.

Abstract
Encysted metacercaria (EMC) in muscles of fresh water fish (Tilapia spp.) may be hazardous to consumers or fish eating mammals. The present study was undertaken to investigate the prevalence and distribution of different EMC in Oreochromus niloticus. A total of 150 specimens of Oreochromus niloticus were collected from different localities at Alexandria Governorate. The overall prevalence of infection with EMC was 58.6% (88 out of 150 examined fishes). Microscopic EMC were 57.3%, where macroscopic EMC were 1.3%. The prevalence was higher in summer (79.48%) followed by spring (72.72%) and autumn (65.62%) then winter (45.71%). The average number of EMC per gram of fish tissues was highest in trunk region (69) followed by tail (58) and lowest in head region (39). Six species of EMC were identified, the prevalence of Heterophyes spp. ( H. heterophyes and H. equalis) was 37.3%, Pygidiopsis geneta (16.7%), Haplorchis yokogawai (14%), Prohemistomum vivax (10.6%), Clinostomum tilapiae (1.3%) and Euclinostomum heterostomum (0.6%). Chemical composition of Oreochromus niloticus muscles infected with encysted metacercariae and control (healthy) muscles revealed that there is no obvious changes. Effect of freezing on the infectivity revealed that all EMC were killed at -10°C/14 days and at -30°C / 24 hrs. Zoonotic importance and impact of infection in fish as a source of high quality protein was discussed.

Key words: metacercariae , Tilapia nilotica , public health significance


 
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Pubmed Style

Satour NS, Zayed AF, . Occurrence of Encysted Metacercariae in Tilapia Nilotica (Oreochromusniloticus) in Alexandria Province and their Public Health Significance. AJVS. 2019; 61(2): 1-10. doi:10.5455/ajvs.40272

Web Style

Satour NS, Zayed AF, . Occurrence of Encysted Metacercariae in Tilapia Nilotica (Oreochromusniloticus) in Alexandria Province and their Public Health Significance. https://www.alexjvs.com/?mno=40272 [Access: December 03, 2023]. doi:10.5455/ajvs.40272

AMA (American Medical Association) Style

Satour NS, Zayed AF, . Occurrence of Encysted Metacercariae in Tilapia Nilotica (Oreochromusniloticus) in Alexandria Province and their Public Health Significance. AJVS. 2019; 61(2): 1-10. doi:10.5455/ajvs.40272


Vancouver/ICMJE Style

Satour NS, Zayed AF, . Occurrence of Encysted Metacercariae in Tilapia Nilotica (Oreochromusniloticus) in Alexandria Province and their Public Health Significance. AJVS. (2019), [cited December 03, 2023]; 61(2): 1-10. doi:10.5455/ajvs.40272


Harvard Style

Satour, N. S., Zayed, A. F. & (2019) Occurrence of Encysted Metacercariae in Tilapia Nilotica (Oreochromusniloticus) in Alexandria Province and their Public Health Significance. AJVS, 61 (2), 1-10. doi:10.5455/ajvs.40272


Turabian Style

Satour, Neveen S, Amany Farag Zayed, and . 2019. Occurrence of Encysted Metacercariae in Tilapia Nilotica (Oreochromusniloticus) in Alexandria Province and their Public Health Significance. Alexandria Journal of Veterinary Sciences, 61 (2), 1-10. doi:10.5455/ajvs.40272


Chicago Style

Satour, Neveen S, Amany Farag Zayed, and . "Occurrence of Encysted Metacercariae in Tilapia Nilotica (Oreochromusniloticus) in Alexandria Province and their Public Health Significance." Alexandria Journal of Veterinary Sciences 61 (2019), 1-10. doi:10.5455/ajvs.40272


MLA (The Modern Language Association) Style

Satour, Neveen S, Amany Farag Zayed, and . "Occurrence of Encysted Metacercariae in Tilapia Nilotica (Oreochromusniloticus) in Alexandria Province and their Public Health Significance." Alexandria Journal of Veterinary Sciences 61.2 (2019), 1-10. Print. doi:10.5455/ajvs.40272


APA (American Psychological Association) Style

Satour, N. S., Zayed, A. F. & (2019) Occurrence of Encysted Metacercariae in Tilapia Nilotica (Oreochromusniloticus) in Alexandria Province and their Public Health Significance. Alexandria Journal of Veterinary Sciences, 61 (2), 1-10. doi:10.5455/ajvs.40272




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    The Alexandria Journal of Veterinary Sciences (AJVS) Official Journal of Faculty of Veterinary Medicine, Alexandria University   ISSN: 1110 ... Read more.



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