Resumo

THOMAS, J et al. Factores de Riesgo de Contaminación de la Leche con Bacterias Esporuladas (Clostridium) en Establecimientos Lecheros de la Provincia de Santa Fe. FAVE. Secc. Cienc. agrar. [online]. 2012, vol.11, n.1, pp.19-28. ISSN 1666-7719.

The exploratory study of bulk milk contamination with spores (Clostridium) in 20 dairy farms (Santa Fe Province) with silage feeding most of trie year (2 samples/farm, fall 2010) indicates a high proportion of contaminated tanks. Statistical analysis of risk factors of contamination in 9 farms (dairy and milking hygiene -quality, extraction and distribution of silage- dung contamination) from fall 2010 to fall 2011, indicates: diffcrcnces bctwecn scasons-with and without silage (Spring), and confirms thal the increasing risk ot'contamination with Closlridium comes f'rom leeding poor quality silage. Those dairies with good quality silage, high technology ofextraction and distribution of silage. high hygiene of cows and the environment, and high teat hygiene during the milking routine, achieve low concentration of spores/l of milk (< 200 MPN /I) and low concentration of spores/g of íaeces (<10.000 MPN/g faeces).

Palavras-chave : Clostridium spores; Bulk tank milk; Silage.

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