Brazil						                            
                            
						
 Research Article
												Prevalence Reduction of Contagious Mastitis Pathogens in a Holstein Dairy Herd Under Tropical Conditions 						
Author(s): Juliana FM Mendonça, Maria  AVP Brito, Carla C Lange, Márcio R Silva, João B Ribeiro, Letícia C Mendonça and Guilherme N SouzaJuliana FM Mendonça, Maria  AVP Brito, Carla C Lange, Márcio R Silva, João B Ribeiro, Letícia C Mendonça and Guilherme N Souza             
						
												
				 The aim of this study was to evaluate the reduction of intramammary infection caused by Streptococcus agalactiae and Staphylococcus aureus in a Holstein dairy herd under tropical conditions. The period of study was from January 2012 from January 2013 in a dairy herd composed by Holstein cows, with an average of 142 lactating cows/month. Milk samples were collected from individual lactating cows for microbiological tests. The sampling lactating cows was in order to identify those infected by Streptococcus agalactiae for the treatment of all mammary quarters with intramammary antibiotics, as well as to identify chronically infected lactating cows by S. aureus for possible culling. During this period, 161 treatments of cows with an intramammary antibiotic were performed to eliminate Streptococcus agalactiae, and nine cows chronically infected with Staphylococcus aureus were culled. The p.. Read More»
				  
												DOI:
												 10.4172/2157-7579.1000497 
																	  
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