Ozonized Water, Microwaves and Freezing Effects on Viability of Encysted Metacercariae in Fish Muscle

International Journal of Veterinary Science
© 2020 by SSRG - IJVS Journal
Volume 6 Issue 1
Year of Publication : 2020
Authors : Hanan, A.A.Elghayaty, Samar, W.A.Tadros
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Hanan, A.A.Elghayaty, Samar, W.A.Tadros, "Ozonized Water, Microwaves and Freezing Effects on Viability of Encysted Metacercariae in Fish Muscle," SSRG International Journal of Veterinary Science, vol. 6,  no. 1, pp. 6-15, 2020. Crossref, https://doi.org/10.14445/24550868/IJVS-V6I1P102

Abstract:

The objective of this study is to evaluate the impact of ozonized water, microwaves cooking and freezing to inactivate the encysted metacercariae (EMC) and evaluate the prevalence of it in both Tilapia and Mugil species fish from Port-Said, Egypt. A total of 275 fishes (150, from Tilapia species and 125, Mugil species) was collected from June 2016 to May 2017, the incidence of EMC was 71.63%,with the highest prevalence in Summer 89.55% followed by Autumn 86.25%, the Spring 60% and the lowest was in Winter 46.03%. The prevalence was 70.66% and 72.8% in Tilapia and Mugil fish respectively. From the biological experimental infestation of chickens 4 species of trematodes were recovered (2 from Tilapia) Metagonimus Yokogawai & Haplorchis Yokogawai. and (2 from Mugil) Heterophyes heterophyes & Heterophyes aequalis. The treatments of infested fish muscle revealed that Microwave cooking at 500 Watt for 2 minutes be sufficient to destroy any EMC in it, also freezing the fish at -4° C to -5° C for 10 days are keeping the fish completely safe to consumer. The treatments of fish muscle by ozonized water, 25 ppm/ 8 minutes and 30 ppm / 10 minutes not completely safe enough to consumer to eat raw fish but the result give that; as the ozone concentration increased and prolonged time the affectivity increased.

Keywords:

Fish, Encystedmetacercare, ozone, Microwave, Freezing.

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