Data/hora: 11/06/2024 02:14:29

Provedor de dados: 	Ciência Rural	
País: 	Brazil	
Título: 	Relationship between total bacteria counts and somatic cell counts from mammary quarters infected by mastitis pathogens	
Autores: 	Lopes Júnior,João Emídio Ferreira; Lange,Carla Cristine; Brito,Maria Aparecida Vasconcelos Paiva; Santos,Fabiana Ribeiro; Silva,Marco Aurélio Souto; Moraes,Luciano Castro Dutra de; Souza,Guilherme Nunes de.	
Data: 	2012-04-01	
Ano: 	2012	
Palavras-chave: 	Mastitis pathogens; Somatic cell count; Bacteria shedding.	
Resumo: 	This study was conducted to establish the relationship between somatic cell count (SCC) and bacterial shedding from mammary quarters according to mastitis pathogens. Milk samples from 638 mammary quarters were examined for mastitis pathogens, SCC and total bacterial count (TBC). The raw data of SCC and TBC were used to perform descriptive statistics. The significance of the arithmetic mean differences between SCC and TBC according to bacteriological examination results was determined by a two-tailed unpaired t-test. Pearson and Spearman´s correlations were done with logarithmic data and linear regression analyses. The geometric means of the bacteriological examination results were (cells mL-1; CFU mL-1): no growth (52,000; 12,000), coagulase-negative staphylococci (85,000; 17,000), Staphylococcus aureus (587,000; 77,000); other streptococci (432,000; 108,000) and Streptococcus agalactiae (1,572,000; 333,000). The Pearson and Spearman's correlations between SCC and TBC were higher than 0.60 for all mastitis pathogens. The regression analyses slopes showed different increase in TBC with the same increase in SCC according to mastitis pathogens. The slope for S. agalactiae (0.542) was higher than that for other mastitis pathogens. The results suggest that the intensity of inflammatory process was associated with number of mastitis pathogens shedding from the mammary gland.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000400019	
Editor: 	Universidade Federal de Santa Maria	
Relação: 	10.1590/S0103-84782012000400019	
Formato: 	text/html	
Fonte: 	Ciência Rural  v.42 n.4 2012	
Fonte: 	info:eu-repo/semantics/openAccess