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Effect of different ventilation regimens on ewes' milk and Canestrato Pugliese cheese quality in summer

Published online by Cambridge University Press:  22 September 2005

Marzia Albenzio
Affiliation:
Dipartimento PRIME, Università degli Studi di Foggia, Via Napoli, 25, 71100 Foggia, Italy
Antonella Santillo
Affiliation:
Dipartimento PRIME, Università degli Studi di Foggia, Via Napoli, 25, 71100 Foggia, Italy
Mariangela Caroprese
Affiliation:
Dipartimento PRIME, Università degli Studi di Foggia, Via Napoli, 25, 71100 Foggia, Italy
Rosaria Marino
Affiliation:
Dipartimento PRIME, Università degli Studi di Foggia, Via Napoli, 25, 71100 Foggia, Italy
Pasquale Centoducati
Affiliation:
Dipartimento di Sanità, Patologia, Farmaco-Tossicologia e Benessere degli Animali, Università degli Studi di Bari, 70010 Valenzano – Bari, Italy
Agostino Sevi
Affiliation:
Dipartimento PRIME, Università degli Studi di Foggia, Via Napoli, 25, 71100 Foggia, Italy

Abstract

The influence of three different ventilation regimens on air pollution in sheep houses and on the quality of ewe milk and of Canestrato Pugliese cheese was investigated during the summer season. The experimental treatments were low ventilation regimen (VR=35 m3/h per ewe) split in 30-min ventilation cycles (LOV-30); moderate ventilation regimen (VR=70 m3/h per ewe) split in 30-min ventilation cycles (MOV-30); moderate ventilation regimen (VR=70 m3/h per ewe) split in 60-min ventilation cycles (MOV-60). The LOV-30 milk had higher microbial load and bulk milk somatic cell count (BMSCC) and resulted in a weaker casein matrix in the curd compared with the MOV-30 and MOV-60 treatments. At 45 d of ripening, the LOV-30 cheeses had a lower casein content and higher non-casein nitrogen (NCN) and water-soluble nitrogen (WSN) contents than the MOV-30 and MOV-60 cheeses. Urea-polyacrylamide gel electrophoresis (urea-PAGE) of the pH 4·6-soluble N extract showed that the MOV-60 cheeses had fewer bands derived from casein (CN) hydrolysis than the LOV-30 or MOV-30 cheeses, despite its having exhibited the highest plasmin (PL) activity levels. Our results suggest that the ventilation regimen is critical in dairy sheep housing for optimizing the hygienic quality of ewe milk and the proteolytic processes occurring in Canestrato Pugliese cheese during ripening.

Type
Research Article
Copyright
Proprietors of Journal of Dairy Research 2005

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