Microbial pathogens from goat mastitis and phage-typing of Staphylococcus aureus isolates

Area of Science:

• Veterinary Microbiology
• Animal Health
• Bacteriology

Background:

• Mastitis is a significant concern in dairy goats, impacting milk quality and animal welfare.
• Identifying causative agents and their origins is crucial for effective disease control strategies.

Purpose of the Study:

• To identify bacterial and mycoplasma pathogens in milk from clinically affected and apparently healthy goats.
• To investigate the potential link between Staphylococcus aureus strains in goats and human infections using phage typing.

Main Methods:

• Milk samples from clinically affected and healthy goats were cultured for bacterial and mycoplasma isolation.
• Antibiotic susceptibility testing was performed on bacterial isolates.
• Staphylococcus aureus isolates were subjected to phage typing using human Staphylococcal International Phages.

Main Results:

• Multiple pathogens were identified, including Staphylococcus aureus, Streptococcus spp., Escherichia coli, Pasteurella spp., and Mycoplasma spp.
• Most isolates showed sensitivity to broad-spectrum antibiotics.
• Phage typing of Staphylococcus aureus isolates revealed 15 distinct phage types, with several matching those found in human infections, suggesting a potential zoonotic link.

Conclusions:

• The study identified key pathogens contributing to caprine mastitis, with Staphylococcus aureus being prevalent.
• Phage typing indicates a possible association between human and caprine Staphylococcus aureus strains, highlighting potential zoonotic implications.
• Further research is needed to explore the epidemiology and transmission dynamics of Staphylococcus aureus in goat populations.