Abstract

SEPULVEDA ACEVES, Juan et al. Autogenous vaccine evaluation as a tool to control Mastitis during lactation in Holstein cows. Nova scientia [online]. 2010, vol.2, n.4, pp.1-15. ISSN 2007-0705.

The efficiency of autovaccines for Mastitis control was evaluated in 52 lactating dairy cows. Milk samples were collected, cultured on blood agar and incubated. With the isolated environmental microorganisms a polyvalent autovaccine with killed encapsulated cells was produced. Half of the cows were vaccinated twice at 15 days intervals and the other half remained as control. The animals of both groups had similar characteristics. The Somatic cell count in milk (SCC) was determined during thirty days every beginning the day of first vaccination. During that period the vaccinated group had a lower SCC geometric mean (272,952) than the control group (326,098), whit a reduction of 16.2% (p = 0.01). Monthly SCC during 6 months evidenced a reduction of 23% (p= 0.02) with respect to the control group (252,000 y 328,500 SCC respectively). There was also a reduction in subclinical mastitis incidence in vaccinated animals of about 16.9% and of clinical mastitis of 35.3% (p=0.01 y p=0.12). The vaccinated animals produced more milk, from day 0 to 30 after treatment 0.6 lts (2.7%, p=0.04), 1.9 lts (7.3%, p< 0.05) from 15 days to 4 months and of 1.1 lts (4.3%, p<0.05 from 15 days to 6 months). Autogenous Vaccines demonstrated to be an effective tool for subclinical and clinical mastitis control, as well as for improving milk production.

Keywords : Mastitis; autovaccine; bacterin; exopolysaccharide; inmunization.

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