title: Effect of different ventilation regimens on ewes' milk and Canestrato Pugliese cheese quality in summer.
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.
authors.affiliation: Dipartimento PRIME, Università degli Studi di Foggia, Via Napoli, 25, 71100 Foggia, Italy. m.albenzio@unifg.it
authors.forename: Marzia
authors.initials: M
authors.lastname: Albenzio
authors.forename: Antonella
authors.initials: A
authors.lastname: Santillo
authors.forename: Mariangela
authors.initials: M
authors.lastname: Caroprese
authors.forename: Rosaria
authors.initials: R
authors.lastname: Marino
authors.forename: Pasquale
authors.initials: P
authors.lastname: Centoducati
authors.forename: Agostino
authors.initials: A
authors.lastname: Sevi
mesh_terms: D000818:Animals; D002364:Caseins / Q000032:analysis; D002452:Cell Count / Q000662:veterinary; D002611:Cheese / Q000382:microbiology / Q000592:standards*; D015169:Colony Count, Microbial / Q000662:veterinary; D005260:Female; D005285:Fermentation; D005511:Food Handling / Q000379:methods*; D005516:Food Microbiology; D008892:Milk / Q000166:cytology / Q000382:microbiology / Q000592:standards*; D008894:Milk Proteins / Q000032:analysis / Q000378:metabolism*; D009584:Nitrogen / Q000032:analysis; D012621:Seasons; D012756:Sheep; D013997:Time Factors; D014691:Ventilation / Q000379:methods* / Q000592:standards
chemical_list: D002364:Caseins; D008894:Milk Proteins; D009584:Nitrogen