Variations in milk composition of some farm animals resulted by sub-clinical mastitis in al-Diwania Province

Abstract EN

This study was carried out to evaluate the effect of sub-clinical mastitis and sex of birth on physico chemical composition of milk for some species of farm animals (Cows, Sheep and Goats) in Al-Diwania province during a period from March to August 2012.

A total of (120) samples of raw milk includes (40) samples for cows, (35) samples for sheep and (45) samples for goats were used in this study.

The results of this study revealed that there was a significantly difference (P < 0.05) in fat and lactose percentages for milk of sheep and goats.

Fat percentages were (3.36 ± 0.24) and (3.33 ±0.16) for milk of infected sheep and goats with sub clinical mastitis respectively as compared to (5.04 ± 0.14) and (4.20 ± 0.02) for milk of uninfected animals while, the percentages of lactose were (4.27 ± 0.02) and (4.30 ± 0.01) for milk of uninfected sheep and goats respectively as compared to (3.91 ± 0.13) and (4.06 ± 0.11) for milk of infected of the same animals.

The results also showed a significantly (P < 0.05) higher in the solid not fat (SNF) percentage for milk of infected cows.

The percentage of SNF was (9.12 ± 0.12) for milk of uninfected cows as compared to (8.78 ± 0.08) for milk of infected cows.

Protein percentages was a significantly (P < 0.05) higher in milk of uninfected cows and sheep, in which was (3.85 ± 0.11) and (5.75 ±0.11) in both species respectively.

The results of this study showed that there was a significantly (P < 0.05) higher in PH values of milk for infected of three studied species as compared with milk of uninfected of the same species animals in which was (6.94 ± 0.06), (6.71 ± 0.04) and (6.73 ± 0.01) for the three species respectively.

The results also demonstrated a significantly (P < 0.05) effect of sex of birth on fat and SNF percentages for milk of goats and a significantly (P < 0.05) higher of protein percentage in milk for sheep which born male as compared to that born female (5.21 ± 0.35) and (3.89 ± 0.33) respectively.