Aetiology and prevalence of bovine intramammary infection at drying off

作者：Macesic Nino^*; Karadjole Tugomir; Bacic Goran; Benic Miroslav; Karadjole Martina; Vince Silvijo; Lipar Marija; Cergolj Marijan

来源：Veterinarski Arhiv, 2012, 82(2): 125-131.

• cow
• mastitis
• intramammary infection
• prevalence
• etiology

The aim of this research was to determine the etiology and prevalence of udder infection in dairy cows before drying off on dairy farms in Croatia. Research was carried out on 6 dairy farms in Croatia. Milk samples were taken in sterile plastic tubes during the last milking prior to drying off. Bacteriological examination of the milk samples produced 54 positive samples; the prevalence of intramammary infection (IMI) was 22.5%. The most common pathogens of IMI prior to drying off were Streptococcus spp. Lancefield group D (7.79%) and Staphylococcus aureus (6.56%). Other pathogens were coagulase-negative staphylococci (2.87%). Pseudomonas spp. (2.46%), Streptococcus agalactiae (2.05%), and other microorganisms (1.23%). In this research, a higher IMI prevalence in the rear quarters (P = 0.03) compared to the front quarters was observed. There was no significant difference in the prevalence of infection (P = 0.07)when comparing the right and left quarters. A significantly higher prevalence of infection caused by Streptococcus spp. Lancefield group D (P = 0.04) and environmental pathogens (P = 0.02) was noted in the rear quarters. These results proved that environmental microorganisms were the most common pathogens of IMI, prior to drying off, in dairy cows in Croatia.

• 出版日期2012-4