title: The evaluation of the curd forming ability of milk replacers.
abstract: Inadequate milk curd formation in the abomasum of newborn calves causes malnutrition and diarrhea. In order to define the factors of inadequate curd formation, we compared the curd forming ability among 9 kinds of milk replacers, bulk milk (raw milk), and skim milk both in vitro and in vivo. When rennet was added, the raw milk and one milk replacer formed firm curds. The rest of the milk replacers and skim milk did not form any curd. When a solution of HCl was added, raw milk, three milk replacers and skim milk formed the curd at pH 4.5, but the other milk replacers did not. When HCl was added following the rennet, raw milk, one milk replacer and skim milk formed the curd. In vivo, raw milk, two milk replacers and skim milk showed good curd formation whereas the other milk replacers showed poor curd formation inside the abomasums of the calves. This study showed that most of the milk replacers sold in Japan could not form the curd with rennet.
authors.affiliation: Department of Clinical Veterinary Medicine, Faculty of Agriculture, Iwate University, Morioka, Japan. keiji@iwate-u.ac.jp
authors.forename: Keiji
authors.initials: K
authors.lastname: Okada
authors.forename: Junro
authors.initials: J
authors.lastname: Kato
authors.forename: Tamako
authors.initials: T
authors.lastname: Miyazaki
authors.forename: Kentaro
authors.initials: K
authors.lastname: Ikuta
authors.forename: Yoshihisa
authors.initials: Y
authors.lastname: Naito
authors.forename: Jun
authors.initials: J
authors.lastname: Yasuda
mesh_terms: D000018:Abomasum / Q000502:physiology; D000821:Animal Feed; D000818:Animals; D000831:Animals, Newborn; D002417:Cattle; D012085:Chymosin / Q000737:chemistry* / Q000378:metabolism; D005766:Gastrointestinal Contents; D006851:Hydrochloric Acid / Q000737:chemistry / Q000378:metabolism; D007564:Japan; D008892:Milk / Q000737:chemistry* / Q000378:metabolism; D041941:Milk Substitutes / Q000737:chemistry* / Q000378:metabolism
chemical_list: C025350:rennet; D012085:Chymosin; D006851:Hydrochloric Acid