Physicochemical properties and microbial load evaluation of raw cow milks of Jimma Town, Ethiopia

IF 1.3 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-03-06 DOI:10.4314/bcse.v37i3.2

Tesfaye Tadesse, A. Gure, K. Kedir

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Abstract

ABSTRACT. In this study, physicochemical properties and microbial loads of raw and sterilized cow milks of Jimma town, Ethiopia, were investigated. Raw and sterilized milk samples were collected from milk venders and local market, respectively. Standard methods were used for analysis of both physicochemical and microbial loads of the samples. The results of the study showed that physicochemical properties of the studied milk samples were within the recommended values. The total bacteria count (TBC) and coliform count (CC) of raw milk samples were above the recommended values, whereas their values in the sterilized milk sample were comparable with the recommended values. However, the yeast and mould count (YMC) of the studied milk samples were comparable with their recommended values. ANOVA (p < 0.05) results showed the presence of significant differences in the physicochemical properties such as temperature, pH, titratable acidity, total solids, solids not fat, protein, fat, lactose, total bacteria count and coliform count among the studied milk samples. In general, the studied raw and sterilized milk samples had acceptable physicochemical properties. However, the TBC and CC of the raw milk samples were above their respective recommended values, which might be attributed to the low hygienic practices of the venders. KEYWORDS: Raw and sterilized cow milks, Physicochemical properties, Microbial load Bull. Chem. Soc. Ethiop. 2023, 37(3), 553-563. DOI: https://dx.doi.org/10.4314/bcse.v37i3.2

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埃塞俄比亚Jimma镇生牛奶的理化性质和微生物负荷评价

摘要在这项研究中，研究了埃塞俄比亚Jimma镇生牛奶和灭菌牛奶的理化性质和微生物负荷。食环署分别在奶贩及本地街市收集生奶样本及消毒奶样本。采用标准方法对样品的理化和微生物负荷进行分析。研究结果显示，所研究的牛奶样本的理化性质均在建议值之内。原料奶样品的细菌总数(TBC)和大肠菌群计数(CC)均高于推荐值，而灭菌乳样品的细菌总数和大肠菌群计数与推荐值相当。然而，所研究的牛奶样品的酵母和霉菌计数(YMC)与推荐值相当。方差分析结果(p < 0.05)表明，不同样品的温度、pH、可滴定酸度、总固形物、非脂肪固形物、蛋白质、脂肪、乳糖、总细菌数和大肠菌群数等理化性质均存在显著差异。总的来说，所研究的生奶和灭菌奶样品具有可接受的物理化学性质。然而，原料奶样本的总脂肪含量及总脂肪含量均高于各自的建议值，原因可能是供应商的卫生习惯较差。关键词:生牛乳、灭菌牛乳、理化性质、微生物负荷化学。Soc。阿比西尼亚人。2023年,37 (3),553 - 563 . DOI: https://dx.doi.org/10.4314/bcse.v37i3.2

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来源期刊

Bulletin of the Chemical Society of Ethiopia 化学-化学综合

CiteScore

2.20

自引率

8.30%

发文量

113

审稿时长

6-12 weeks

期刊介绍： The Bulletin of the Chemical Society of Ethiopia (BCSE) is a triannual publication of the Chemical Society of Ethiopia. The BCSE is an open access and peer reviewed journal. The BCSE invites contributions in any field of basic and applied chemistry.