Sains Ma1aysiana 27: 9-17 (1998)                                                                                                 Sains Hayat/

                                                                                                                                                                 Life Sciences

Mutu Mikrobiologi Susu Lembu Mentah Kawasan

Selatan Semenanjung Malaysia

(Microbiological quality of raw milk from the southern

region of Peninsular Malaysia)

Chye Fook Yee, Aminah Abdullah & Mohd Khan Ayub

Jabatan Sains Makanan dan Pemakanan,

Fakulti Sains Hayat

Universiti Kebangsaan Malaysia,

43600 UKM Bangi Se1angor D.E.

ABSTRAK

Kualiti mikrobiologi susu lembu mentah di kawasan Selatan Semenanjung Malaysia telah dianalisis untuk menentukan status mikrobiologi dan kehadiran patogen terpilih dalam susu tempatan. Susu yang diambil dari 127 ladang ternakan lembu mempunyai min kiraan plat total, koliform dan Escherichia coli yang tinggi, iaitu masing-masing 5.5 ´ 10⁵ - 2.7 ´ 10⁷/ml, 2.4 ´ 10⁴-8.0 ´ 10⁵/ml dan 3.5 ´ 10³ - 4.6 ´ 10⁴/ml. Hampir 63% daripada sampel susu dicemari oleh Staphylococcus aureus manakala 33% adalah positif bagi E. coli 0157:H7. Sebanyak 5 serotip salmonella termasuk S. agona, S. newport, S. heldelberg, S. typhimurium dan S. weltevreden telah dikenal pasti. Sementara itu, sebanyak 18 strain Listeria spp. telah dipencilkan daripada 4.2% sampel yang positif.

ABSTRACT

The microbiological quality of raw milk from the southern region of Peninsular Malaysia was analyzed for the microbial status as well as the prevalence of selected emerging pathogens in local milk. The mean counts per ml for total plate, coliform and Escherichia coli were generally high for all samples collected from 127 dairy farms, with a range of 5.5 ´ 10⁵ - 2.7 ´ 10⁷/ml, 2.4 ´ 10⁴-8.0 ´ 10⁵/ml dan 3.5 x 10³ - 4.6 x 10⁴/ml respectively. Approximately 63% of milk samples were contaminated with Staphylococcus aureus and 33% were E. coli 0157:H7 positive. Five serotypes of Salmonella were identified including S. agona, S. newport, S. heldelberg, S. typhimurium and S. weltevreden. Meanwhile 18 strains of Listeria spp. were isolated from 4.2% of the positive samples.

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