Abstract

DETECTION OF AEROBIC BACTERIA ASSOCIATED WITH WHITE CHEESE IN EL OBIED CITY IN NORTH KORDOFAN STATE, SUDAN

Eiman A. A. Mohammed and El Ayis A. Abubaker*

ABSTRACT

This study was conducted out in El Obied city in North Kordofan State (Sudan), during the year 2019. The study was aiming at isolation and identification of aerobic bacteria associated with cheese in El Obied city in North Kordofan State. Sixty white cheese samples were collected from different factories, markets and super markets in the city. Samples were subjected for Bacterial Total Plate Count (TPC) and other bacteriological examinations. All of the 20 white cheese samples collected from factories in El Obied city had a bacterial viable count (TPC) ranging between 2.5X105 and 2.8X109 CFU/ml. All of the 20 white cheese samples collected from the markets in El Obied city, had a bacterial viable count (TPC) ranging between 1.3X107 and
uncountable CFU/ml. All of the 20 white cheese samples collected from the supermarkets in El Obied city, had a bacterial viable count (TPC) ranging between 3.6X106 and uncountable CFU/ml. According to the cultural characteristics, bacterial morphology and biochemical reactions results, the identified bacteria were: 15 Staphylococcus aureus (25.0%), 8 Staphylococcus epidermidis (13.3%), 7 Staphylococcus chromogenes (11.7%), 2 Corynebacterium bovis (3.3%), 11 E. coli (18.3%), 10 Pseudomonas aerogenosa (16.7%), 6 Salmonella spp. (10.0%) and 1 Proteus mirabilis (1.7%). Staphylococci represented the predominant bacteria (50.0%) isolated from cheese samples compared to other bacteria: Corynebacterium bovis (3.3%), E. coli (18.3%), Pseudomonas aerogenosa (16.7%), Salmonella spp. (10.0%) and Proteus mirabilis (1.7%).

Keywords: This study was conducted out in El Obied city in North Kordofan State (Sudan), during the year 2019.