Determination of cattle carcass and offal quality by post slaughter hygiene criteria

Thesis Type: Doctorate

Institution Of The Thesis: Uludağ Üniversitesi, Turkey

Approval Date: 2017

Thesis Language: Turkish




This study aimed to determine the Aerobic Colony Count (ACC), Enterobacteriaceae Count (EC), and the presence of Salmonella in cattle carcasses and offals based on the Regulation of Turkish Microbiological Criteria (2011) Process Hygiene Criteria requirements. Between 2013-2015, a total of 400 samples, comprised of 100 cattle carcass and edible offal (liver, spleen and kidney) samples were collected in 3 slaughterhouses and 1 municipality abbatoir as indicated by the ISO 17604:2003 (2003), and were examined by the international standards ISO 4833-1:2003 and ISO ISO 21528-2:2004 for the enumeration of ACC and ES, and by ISO 6579:2002 for the determination of Salmonella presence. ACC results of 100 carcass samples were in the range of 3,0 x 102 - 4,0 x 105 cfu/cm2 with a mean count of 104 cfu/cm2; while EC counts were between 0,1 x 101 – 8,5 x 102 cfu/cm2 with a mean count of 1,9 x 102 cfu/cm2. When ACC and EC results were evaluated individually, 34%, 56%, 10% of the samples had Acceptable, Satisfactory, and Unacceptable ACC; while EC of the samples were 57% Satisfactory, 34% Acceptable, and 9% Unacceptable. Additionally, none of the carcass or offal samples were found to carry Salmonella spp. In this study, based on the Regulation of Turkish Microbiological Criteria (2011) Process Hygiene Criteria requirements, it was concluded that 90% and 91% of the cattle carcasses had affirmative (Satisfactory and Acceptable) counts by individual ACC and EC, respectively, while 84% had affirmative counts in collective evaluation of ACC and EC.