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Abstract

Approaches in Poultry, Dairy & Veterinary Sciences

Microbiological Quality Analysis of Raw and Pasteurized Milk Samples Collected from Addis Ababa and Its Surrounding in Ethiopia

  • Open or Close Tamirat Tekilegiorgis1*

    1*Department of Quality and Safety Assurance Directorate, Microbiology Laboratory Team, Leader, Ethiopian Meat and Dairy Industry Development Institute, Ethiopia

    *Corresponding author: Tamirat Tekilegiorgis, Department of Quality and safety assurance Directorate, Microbiology Laboratory Team, Leader, Ethiopian Meat and Dairy Industry Development Institute, P.O.BOX 157 Bishoftu, Oromiya, Ethiopia

Submission: August 02, 2018;Published: August 17, 2018

DOI: 10.31031/APDV.2018.04.000598

ISSN : 2576-9162
Volume4 Issue5

Abstract

This study was conducted to evaluate microbiological quality of raw and pasteurized milk samples collected from different locations in Ethiopia in 2016/2017G.c. Two types of milk samples were collected from different part of Addis Ababa and its surrounding of selected sites. A total of 48 samples were analyzed including 28 raw milk samples from the local producers, collectors and dairy markets and 20 different brands of pasteurized treated milk samples collected from different processing industries and from super market. The samples were examined for determining the Total Bacterial Count (TBC) and Total Coli form Count (TCC). The results revealed that the raw and half of pasteurized milk samples were substandard in terms of TBC and TCC. No growth in terms of TBC and TCC in sample number Ra-12 and no growth at TCC in sample number Ra-3. The range of TBC and TCC in raw milk samples was 5Ã-103 to 3.18Ã-108cfu/ml and 1.81Ã-102 to 3.08Ã-106cfu/ml, respectively. The TBC and TCC range in pasteurized milk samples was from 4.4Ã-101 to 4.43Ã-105cfu/ml and 4.5Ã-101 to 2.3 Ã-104cfu/ml, respectively. In some samples the result was much greater of the recommended level by the Ethiopian Standards Agency /ESA/. Exceptionally sample numbers Pa1-6 and Pa-20 of pasteurized milk samples had no growth at all both in terms of TBC and TCC sample number pa-8, 9, 14, and 15 have no growth in terms of TCC. Statistical analysis of data revealed that there is significant difference between results of different samples which implies the contamination of raw and pasteurized milk is above standards. The finding of the study is an indication about the initial bacterial load in raw milk samples as well as in the processed milk sample. So from the consumer point of view, it needs high attention from the regulatory body and other concerned institutions especially on pasteurized types of milk because it is considered to be safe for consumption without any further treatment within the mentioned expiry date. Depends on the result this substandard/lower quality milk leads to high public health hazards. Besides, different regulatory bodies may also realize the importance of frequently inspection of the market milks to ensure whether they meet the minimum standers for the society in terms of quality and safety.

Keywords: Addis Ababa; Ethiopia; ESA (Ethiopian standard Agency); Microbiology; Milk; Pasteurized; Raw; TBC (Total bacterial count); TCC (Total coli form count)

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