Incidence of clinical and subclinical mastitis in a dairy herd in Cluj County

Abstract

The purpose of this work was to supervise the activity and health of the mammary gland in dairy cows in a dairy specialty unit in Cluj County. The objectives of this study can be summarized as follows: diagnosis of mastitis, carrying out a study on the incidence of mastitis according to some factors, performing the microbiological exam and treatment. Following the clinical examination, 6 cows (5.36%) were diagnosed with clinical mastitis. Depending on the type of lesion, it was found that acute mastitis had the highest rate (66.66%), and according to the symptomatology, there were found 2 cases (33.33%) with haemorrhagic mastitis, catarrhal mastitis and purulent mastitis. The highest incidence of clinical mastitis based on the number of lactations was in cows at 3th and 4th lactation (83.33%). Depending on age, all cases of clinical mastitis have been detected in cows aged 4-7 years. After the application of the Kerba Test method, a total of 10 cows (8.93%) were diagnosed with subclinical mastitis. The incidence of subclinical mastitis according to the age of the animals shows that 60% of the cases were recorded in cows aged 5-7 years. The incidence of subclinical mastitis regarding the number of lactations was 20% in cows at 5th lactation, 10% in those at 4th lactation, 30% in those at the 3th lactation, 30% in the 2nd lactation and 10% in the first lactation cows. Bacteriological exam revealed that the most commonly encountered pathogen was Staphylococcus spp. As regards the treatment of clinical mastitis, comparing the average of administrations, we observed a better efficacy of Masti Veyxym and Synulox LC therapy than in the treatment that used exclusively Synulox LC (2.5 vs. 4.5), although performed under the same conditions. In subclinical mastitis we achieved 100% healing after a single administration.