Relationship Among Intramammary Infection and Raw Milk Parameters in Jersey Crossbred Cows under Hot-Humid Climate

The raw milk quality has increasing importance for producer and consumer as it is directly related to processing, production and price. The aim of present study was to determine the relationship among intramammary infection (IMI) and raw milk parameters in Jersey crossbred cows. Total 24 lactating Jersey crossbred cows were randomly selected and representative animal wise morning milk samples were collected in monthly interval for four month. The level of somatic cell count (SCC) and milk parameters (fat (%), solid non-fat (%) and pH) was estimated from the collected sample. Test day milk yield for individual animals was also recorded and then the data obtained were statistically analyzed. A significant (P<0.01) negative correlation of Log10SCC with test day milk yield, fat and SNF percentage was found, while, milk pH was highly positive correlated with Log10SCC in milk. The mean±SE values of milk yield, fat and SNF were significantly (P<0.01) lower in subclinical infected group except for SCC and pH, which were higher in subclinical infected group. It can be concluded that IMI and higher SCC adversely affect the milk production and raw milk quality parameters and these parameters can be used as useful indicator as complimentary to SCC to monitor udder health and for early diagnosis of subclinical mastitis at dairy farm.