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| 仙田, 晶嗣; 中村, 正; 浦島, 匡; 荒井, 威吉. |
| 生乳中の酵母の動態を明らかにすることを目的として，帯広畜産大学と近郊の酪農家3戸で飼養している健康なホルスタイン種乳牛（体細胞数1×105cfu/ml以下）の乳頭表皮，分房乳，バルク乳およびローリー乳中の酵母数の月別変動について調べた．各試料は1999年7月から2000年6月までの1年間，それぞれ毎月1回ずつ採取した．生乳中の酵母の検出率と平均酵母数はそれぞれ順に，乳頭表皮では70.1％，52cfu/cm2，分房乳は47.9％，1.8cfu/ml，バルク乳は100％，28cfu/mlおよびローリー乳では100％，66cfu/mlであった．乳頭表皮および各種類の生乳中において90％以上を占める酵母数の水準は，乳頭表皮が150cfu/cm2以下（90.8％），分房乳が10cfu/ml以下（94.4％），バルク乳が100cfu/ml以下（97.8％）およびローリー乳が150cfu/ml以下（91.7％）であると考えられた．生乳中の酵母数は夏から秋期に高く，冬から春期に低くなる季節的な変動傾向が認められた．健康な乳牛の分房乳中では，主な乳房炎起因菌（C. parapsilosis, C. lambica, C. catenulata, C. rugosa）は夏期に検出されたが，冬から春期には検出されなかった． The objective of this study was to investigate the seasonal incidences of yeast and the seasonal changes of yeast counts (cfu/ml) in a high quality raw milk produced by healthy Holstein cows (≤1×105 somatic... |
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Palavras-chave: Yeast in milk; The incidence of yeast; The seasonal changes of yeast counts. |
| Ano: 2003 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2640 |
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| 荒井, 威吉; 仙田, 晶嗣; 山上, 貴礼; 無量谷, 亜希; 中村, 正; 浦島, 匡; ARAI, lkichi; SENDA, Akitsugu; YAMAGAMI, Kihiro; MURYOYA, Aki; NAKAMURA, Tadashi; URASHIMA, Tadasu. |
| The efficacy of the use of acidic electrolyzed water (AEW) for premilking teat cleaning and disinfection (TCD) was evaluated using a split-udder experimental design. The efficacy of AEW for TCD was compared with that of NaClO solution contained 200 ppm available chlorine (HClO). The viable cell counts levels of SPC，lactic acid bacteria，thermotrophilic bacteria and anaerobe (group A) which contaminated on teat skin were over 10³ cfu/cm²，whereas psychrotrophilic bacteria and coliforms (group B) were less 10² cfu/cm². After TCD with AEW and HClO，viable cell counts levels of the microorganisms of group A and group B were decreased to 2.8-7.6% and 10.0-14.5% respectively. On the other hand，the efficacy of AEW or HClO for TCD was almost constant throughout one... |
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Palavras-chave: 強酸性電解水; 乳頭清拭; Acidic electrolyzed water; Premilking teat cleaning and disinfection. |
| Ano: 2002 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2993 |
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