E-ISSN 2536-9520 | ISSN 1110-2047
 

Original Research (Original Article) 


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

Neveen S. Satour, Amany F. Zayed, Mohamed A. Abdel-Rahman.

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 -10C/14 days and at -30C / 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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How to Cite this Article
Pubmed Style

Satour NS, Zayed AF, Abdel-Rahman MA. 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, Abdel-Rahman MA. Occurrence of Encysted Metacercariae in Tilapia Nilotica (Oreochromusniloticus) in Alexandria Province and their Public Health Significance. http://www.alexjvs.com/?mno=40272 [Access: November 19, 2019]. doi:10.5455/ajvs.40272


AMA (American Medical Association) Style

Satour NS, Zayed AF, Abdel-Rahman MA. 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, Abdel-Rahman MA. Occurrence of Encysted Metacercariae in Tilapia Nilotica (Oreochromusniloticus) in Alexandria Province and their Public Health Significance. AJVS. (2019), [cited November 19, 2019]; 61(2): 1-10. doi:10.5455/ajvs.40272



Harvard Style

Satour, N. S., Zayed, . A. F. & Abdel-Rahman, . M. A. (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 F. Zayed, and Mohamed A. Abdel-Rahman. 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 F. Zayed, and Mohamed A. Abdel-Rahman. "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 F. Zayed, and Mohamed A. Abdel-Rahman. "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. & Abdel-Rahman, . M. A. (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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