Symbiotic effect on some microbiological species and physicochemical properties in milk in subclinical mastitis of dairy cows

Abstract

Abstract. Subclinical mastitis (SCM) is the most common form of mastitis and the greatest cause for concern in dairy cows. The overuse of antibiotics for the treatment of mastitis leads to the development of resistance, resulting in the use of symbiotics. The study was carried out between February and May 2017 at a pilot dairy cattle farm in the Tipaza region (north-central Algeria) aiming to investigate the effect of a symbiotic on SCM. California Mastitis test (CMT) was used to diagnose SCM in a total of 240 dairy cows. A number of 58/240 (24.16%) cows were found to have SCM. These mastitis cows were then divided into two lots; an experimental lot of 37 cows and a control lot of 21 cows. A symbiotic was administered to the experimental lot once a month for three months. Cell count, microbiological analysis and analysis of certain physicochemical parameters of the milk were applied before and after each administration of the symbiotic. The results revealed that the average somatic cells count (SCC) in cows from the control lot was higher than that of cows from the experimental lot throughout the study period (p<0.0001). Staphylococci were isolated from 51/58 (87.93%) of the mastitis cows, of which 21 (36.20%) were infected with Staphylococcus aureus and 30 (51.72%) with coagulase-negative Staphylococcus. Enterobacteriaceae were isolated from 36/58 (62.07%) of the mastitis cows, of which 21 (36.20%) were due to Escherichia coli strain and 15 (25.86%) to other strains of Enterobacteriaceae. After administration of the symbiotic, the prevalence of S. aureus and E. coli decreased significantly in the experimental lot compared to the control lot (p<0.001). The physicochemical characteristics of the milk were not altered by the administration of the symbiotic. All these results show that the symbiotic constitutes an adequate solution to replace antibiotics in the treatment of SCM.

Saúde da Glândula Mamária de Vacas em Lactação: Revisão de Literatura

“…Probióticos e prebióticos, ou mesmo a combinação desses, atuam como imunomoduladores, estimulando o sistema imune do animal, tornando-o mais resistente e apto a combater infecções (GIMENES et al, 2020). Estudos têm mostrado o efeito de produtos simbióticos na saúde da glândula mamária, melhorando a qualidade do leite (ABDENNEBI et al, 2020;YASUDA et al, 2007).…”

“…Um parâmetro de avaliação da saúde da glândula mamária é a contagem de células somáticas (CCS), com indicativo da ocorrência de infecção intramamária no animal, quando os valores acima de 200.000 células por mililitro de leite forem atingidos (QUINTÃO et al, 2017). A utilização de produtos simbióticos tem gerado efeito na redução dessas células no leite (ABDENNEBI et al, 2020;YASUDA et al, 2007). Campolina et al (2019) discorrem que o trato gastrointestinal (TGI) pode influenciar nas bactérias presentes no leite e na glândula mamária, a partir da alteração da alimentação com introdução dos aditivos alimentares.…”