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Abstract
Ninety random samples of chicken meat products represented by breast, thigh and wings (30 of each) were collected from different super markets located in Kalyobia governorate.
All collected samples were bacteriologically examiend for determination of total psychrotrophic count as well as isolation and identification of both Pseudomonas and Aeromonas species contaminating such examiend samples.
The obtained results indicated that the mean values of total psychrotrophic, Pseudomonas and Aeromonas count in the examined samples of chicken meat products were 1.43x105 + 0.37 x105, 6.49x103 + 1.56 x103 & 2.13 x103 + 0.61 x103/g for breast, 7.96x105+1.65x105, 1.25x104 + 0.38x104 & 7.98x103 + 1.82 x103/g for thigh and 4.28 x106 + 0.83 x106, 8.02 x104 + 2.41 x104 & 1.05x104 + 0.27 x104/g for wings, respectively.
The differences associated with the examiend sample of chicken meat products were significant (P < 0.05) due to their contamination either by psychrotrophic, Pseudomonas or Aeromonas bacteria.
Acinetobacter (26.67%), Aeromonas (63.33%), Alcaligenes (23.33%), Chromobacterium (36.67%), Flavobacterium (70.00%), Moraxella (10.00%), Neisseria (16.67%) and Pseudomonas species (83.33%) were isolated from the examined samples of wings. On the other hand, such bacteria were isolated from the examined samples of breast and thigh with varying percentages.
Further more, Pseudomonas species isolated from the examined samples of breast, thigh and wings were identified into Pseudomonas acidovorans (0,0 and 6.67%), Pseudomonas alcaligenes (3.33%, 10% and 23.33%), Pseudomonas diminuta (13.33, 6.67%, 0) Pseudomonas flourescens (20%, 46.67% & 60%), Pseudomonas putida (O, 6.67% and 16.67%), Pseudomonas utrefaciens (36.67%, 26.67% and 43.33%) and Pseudomonas vesicularis (10.00%, 3.33% and 13.33%) respectively.
Concerning Aeromonas species, Aeromonas hydrophila, Aeromonas punctata, Aeromonas salmonicida and Aeromonas sorbia were isolated from 3.33%, 16.67%, 50,00 & 6.67% for thigh and 6.67%, 46.67%, 3.33% and 10.00% for wings, respectively.
In contrast, Aeromonas punctata, Aeromonas salmonicida and Aeromonas sorbia were detected in 30.00%, 23.33% and 6.67% of the examined samples of breast, respectively. It is of great concern, A. Veronii was only isolated from the examined samples of wings (3.33%).
Accordingly, the examined samples of wings were the most contaminated with psychrotrophs as compared with breast and thigh ones.
The public health significance of isolated psychrotrophic bacteria and the possible sources of contamination of chicken meat with these bacteria as well as some recommendations to improve the quality of such food articles were discussed.