[Distribution and forms of latent mastitis in cows]

Area of Science:

• Veterinary Medicine
• Animal Science
• Microbiology

Context:

• Mastitis is a significant concern in dairy cattle, impacting animal health and milk production.
• Subclinical and latent forms of mastitis, collectively termed "symptomless mastitis," present diagnostic challenges.
• This study investigated the prevalence and etiological agents of symptomless mastitis in a large cohort of dairy cows.

Purpose:

• To determine the distribution and prevalence of symptomless mastitis in cows.
• To identify the specific forms and etiological microorganisms involved in symptomless mastitis.
• To assess the correlation between farm management practices and the incidence of symptomless mastitis.

Summary:

• Clinical, cytological, and microbiological investigations were conducted on 2377 cows across 8 farms.
• Symptomless mastitis was found in 68.42% of cows and 24.09% of udder quarters.
• Bacterial mastitis accounted for 67.61% of cases, with Staphylococcus being the predominant pathogen (72.35%).
• Non-specific mastitis or secretory disturbance was observed in 32.39% of affected quarters.
• Subclinical and latent infections represented 50.75% and 17.36% of bacterial mastitis cases, respectively.
• Poor cow rearing and management practices were identified as key factors contributing to the spread of symptomless mastitis.

Impact:

• Highlights the high prevalence of symptomless mastitis in dairy cows, underscoring its economic and animal welfare implications.
• Provides crucial data on the specific microbial agents responsible for mastitis, aiding in targeted treatment and prevention strategies.
• Emphasizes the critical role of improved farm management in controlling and reducing the incidence of mastitis in cattle.