Influencia de la infección subclínica por agentes de la fiebre por garrapatas en vacas lecheras

Translated title of the contribution: Influence of subclinical infection by agents of tick fever in milking dairy cows

Rafael Pazinato, Gustavo Machado, Vanderlei Klauck, Willian M. Radavelli, Jhonatan P. Boito, Paulo H.E. Weis, Luiz Claudio Miletti, Matheus D. Baldissera, M. Sc, Lenita M. Stefani, Aleksandro S.Da Silva

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Objective. The objective of this study was to evaluate the effect of subclinical infection by agents of tick fever in dairy cattle on milk parameters, such as production, composition, and quality. Materials and methods. The study was conducted in a private farm with 75 free-stall-housed dairy cows, from which 37 were evaluated. Monthly, individual milk samples were collected for compositional (fat, lactose, protein, and total solids) and quality (somatic cell counts (SCC) analyses. In addition, blood samples were collected in order to identify cows that were tick fever-negative and positive by PCR for one or more of the following etiological agents: Babesia bovis, Babesia bigemina and Anaplasma marginale. Results. The results showed increased SCC in positive animals for at least one of the agents when compared to non-infected cows (p<0.05). Milk production was significantly lower in A. marginale positive animals (p<0.05). An increase of about 40% in milk solids content was found in B. bovis positive cows. Also, an increment of approximately 23% in lactose was found on cows positives for B. bigemina. Conclusions. We may conclude that the presence of at least one of these parasites in dairy cattle affects composition or quality of their milk.

Translated title of the contributionInfluence of subclinical infection by agents of tick fever in milking dairy cows
Original languageSpanish
Pages (from-to)5490-5499
Number of pages10
JournalRevista MVZ Cordoba
Volume21
Issue number3
DOIs
StatePublished - 2016

Keywords

  • Infectious agents
  • Lactose
  • MeSH)
  • SCC
  • Total solids (Source: CAB

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