Bacteriological Evaluation of Some Fresh and Frozen fish

Document Type : Original Article

Authors

1 Food control Dept., Fac. Vet. Med.

2 Animal Research Institute Shebin El- Koom

Abstract

Ninety random samples of fresh and frozen each of Tilapia niloticus, Mugil cephalus and Shrimp (15 of each) were
collected from different fish markets at Qaliuobia Governorate. All collected samples were bacteriologically examined
for determination of Aerobic Plate Count (APC), psychrotrophic count, Isolation and Identification of pseudomonas and
Aeromonas species. The bacteriological examination revealed the mean values of APC in the examined fish samples was
1.52×106 ± 0.47×106 and 3.08×105 ± 1.31×105 in fresh and frozen Tilapia niloticus, 7.14×105 ± 1.84×105 and 2.59×105 ±
0.62×105 in fresh and frozen Mugil cephalus and 7.81×104 ± 2.07×104 and 1.36×104 ± 0.42×104/g, in fresh and frozen
shrimp . The mean values of psychrotrophic count in fresh and frozen Tilapia niloticus were 2.67×105 ± 0.45×105 and
5.36×105 ± 1.24×105 cfu/g, respectively. 4.91×104 ± 0.93×105 and 1.72×105 ± 0.46×105/ gm respectively in fresh and
frozen Mugil cephalus. 7.81×104 ± 2.07×104 and 6.51×104 ± 1.80×104/g, in fresh and frozen shrimp. The incidence of
Pseudomonas species was 33.3% and 53.3%in the examined samples of fresh and frozen Tilapia niloticus, 46.7% and
60.0 %in fresh and frozen Mugil cephalu, respectively, 33.3 %and 40.0 %in fresh and frozen shrimp, respectively. The
incidence of Aeromonas species were 46.7 %and 33.3 %in the examined samples of fresh and frozen Tilapia niloticus,
53.3 % and 40.0% in fresh and frozen Mugil cephalus, respectively, 33.3 % and 40.0 %in fresh and frozen shrimp,
respectively

Keywords

Benha Veterinary Medical Journal
Volume 31, Issue 1
September 2016
Pages 24-29

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