Evaluation of Chilled Goat Carcass Quality Along the Cold Chain Loaded From Two Export Abattoirs in Ethiopia
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Date
2014-06
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Addis Ababauniversity
Abstract
The study was conducted to determine factors that affect meat quality during storage, loading, transport, unloading and microbial quality of the goat carcasses slaughtered in two export abattoirs in Modjo, Ethiopia. A total of 224 samples were selected randomly from the two export abattoirs to determine the carcass temperature, pH and coliform bacterial count. 111 and 113 goat carcass was selected from the first and second export abattoirs respectively. The log mean temperatures of carcass before loading were +0.55oC and -1.03oC and unloading were 0.091 and 0.960C for the first and second export abattoirs respectively. Independent t-test statistical analysis for mean of temperature readings from the two export abattoirs showed significant difference (P<0.05). Independent samples t-test for mean of chilled carcass temperature at unloading point from the two export abattoirs showed significant difference (P<0.05). The log mean of pH value of the carcass were 6.12 and 5.69 for the first and second abattoir respectively, which were taken from the chilled goat carcass stayed in the cold room for 24 hrs at a temperature of 2±1oC. Independent t-test statistical analysis for mean of chilled carcass pH readings from the two export abattoirs showed significant difference (p<0.05). The paired t-test between the two abattoirs on the difference in animal holding time and pH were statistically significant (p<0.05). Packaging quality were determined subjectively and mean value were 1.62 and 0.6 for the first and second export abattoirs respectively. The log mean of E. coli count before acetic acid (2.5%) spray for the first and the second abattoirs were 49.63 log10 CFU/cm2 and 41.85 log10 CFU/cm2 respectively. Independent samples t-test for the mean of E. coli load on the carcass before acetic acid pray (2.5%) showed no significant difference (p<0.05). The log mean of E. coli load after acetic acid spay were 3.5 log10 CFU/cm2 and 0.00 log10 CFU/cm2 for the first and second abattoirs respectively. Independent samples t-test for the mean of E. coli load on the carcass after acetic acid pray (2.5%) showed no significant difference (p<0.05). The mean of E. coli counts from aprons, workers palm, knife and carcass washing water were compared using independent t- test; statistically, the result were no significantly different (p<0.05). It could be suggested that 2.5% acetic acid spray could reduce E. coli load and lowers the
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pH. And also cold trucks to maintain the temperature required for the carcass could be one of the critical points.
Key words: Temperature, E. coli, Export abattoirs, pH, Goat carcass
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Keywords
Temperature, E. coli, Export abattoirs, pH Goat carcass