MICROBIAL EVALUATION OF RAW MILK FROM A DAIRY FARM
Microbial evaluation of twenty samples of raw milk from a dairy farm (Emene fulani cattle rearers) was carried out using five method: viz direct microscopic count nutrient agar count, Blood agar count, Macconkey agar count (coliforms only) and Acid fast bacilli staring was done to assay for the presence of the Tubercle bacillus. The bacterial was were as follows: direct microscopic counts ranged from 9.0x 105 to 9.5 x 107 counts on Nutrient agar ranged from 9.0 x 104 to 8.0x 105 counts on blood agar ranged from 7.0x 104 to 9.8×10 while counts on Mac country agar ranged between 5.0x 102 to 5 . 0 x 10. The Acid fast bacilli staring did not show a single bacillus, an indication of tubercle free. The gram staring result indicate single chains clusters gram positive bacilli and gram negative bacilli which are characteristics of staphylococcus spp streptococcus spp lactobacillus spp and coliform. it is suggested that milkmaids and milk processors should endeavor to wash the udder of the con, sterols their equipment and containers as well as improving their personal hygiene during milk collection . these will contribute to the quality of products in our milk industries as well as the good health of man especially the fulani cattle rearers that drink without pasteurization.
TABLE OF CONTENT
1.1 Background information
1.2 Statement on problem
1.3 Aim and objective of the study
1.5 Justification of the study
1.6 Limitation of the study
2.0 Literature Review
2.1 sources of raw Milk
2.2 composition of raw milk
2.3 Raw Milk as a growth medium
2.4 Sources of contamination of raw Milk.
2.5 Contaminant of raw Milk
3.1 material and apparatus
3.2 collection of sample
3.3 preparation of culture media
3.4 Quantitative analysis of total bacteria.
3.4.1 Direct Microscopy
3.4.2 Viable plate count
3.4.3 Gram stating
3.4.4 Acid fast Bacilli stain
4.0 Results and Discussion
5.0 Conclusion And Recommendation
1.1 BACKGROUND INFORMATION
Milk is defined as a secretion of mammary gland of female animals. It is an exceptionally good source of protein which is of a high biological value in promoting the growth of children (ihekorany and Ngoddy, 1985). Milk is decribed as a good of outstanding interest, which is designed by nature to be complete good for very young mammals (fox and Cameron, 1980).
Milk contains a wide variety of constituents and contains most of the food factors associated with bacterial nutrition. Milk as a single food is of high nutritional value and is associated with spoilage microorganisms. At the time milk leaves the udder of the healthy cow, it contains few bacteria these stem from milk ducts and cistern. During the milking process, bacteria are usually added from various sources. In hand milking the sources are air the hair of the animal manure, the milkers equipment such as pails, feed and machine, most of these environmental factors are less important. However, the milking equipment may serve as an important source of contamination if it is not carefully cleaned and sanitized (ihekoronye and Ngoddy, 1985).
After milk has been drawn it is rapidly cooled to 45 of prevent contaminants from multiplying. To eliminate pathogens from milk the process of pasteurization is applied. This involves application of heat below the boiling point (frazier and westhoff, 1978).
1.2 STATEMENT OF PROBLEM
Mike as a food of high nutritional value is highly associated with microorganisms. As a result of this contamination of raw milk, it not sterilized and taken directly or used for production of milk products, causes disease to man and also contribute to the spoilage of milk and milk products.
1.3 AIM AND OBJECTIVES OF THE STUDY.
AIM: The aim of the study is to evaluate the microflora of raw milk
Objectives: The objectives of the study are;
i) To isolate and identify microorganisms that are contaminate raw milk.
ii) To determine of the milk is tubercle bacilli free.
iii) To assay for the presence of coliform as an index of pathogens.
Ho: All fresh raw milk from healthy cows are free from marshal contamination both pathogenic and non-pathogenic.
H1: All fresh raw milk from healthy cows are net free from microbial contamination both pathogenic and non- pathogenic.
1.5 JUSTIFICATION OF THE STUDY
Milk is know to be heavily contaminated by microorganisms if net properly handled. Therefore, there is a need to evaluate consumption or processing it for milk products