The effect of heating against Cryptosporidium oocysts
The effect of heat treatment was examined against oocysts of Cryptosporidium parvum, Cryptosporidium tnuris and chicken Cryptosporidium sp. isolated in Japan. The oocysts of these species were exposed at 50, 55, 60 and 70degC for 5, 15, 30 and 60 sec in water bath, respectively. To determine the inf...
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Published in | Journal of Veterinary Medical Science Vol. 64; no. 3; pp. 199 - 200 |
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JAPANESE SOCIETY OF VETERINARY SCIENCE
01.03.2002
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Abstract | The effect of heat treatment was examined against oocysts of Cryptosporidium parvum, Cryptosporidium tnuris and chicken Cryptosporidium sp. isolated in Japan. The oocysts of these species were exposed at 50, 55, 60 and 70degC for 5, 15, 30 and 60 sec in water bath, respectively. To determine the infectivity of heated oocysts, the mice and chickens were inoculated with the treated oocysts and the oocyst output in the feces after inoculation was examined. In C. parvum and chicken Cryptosporidium sp., the oocysts were not detected from mice or chickens which were received oocysts heated at 55degC for 30 sec, 60degC for 15 sec and 70degC for 5 sec. In C. muris, the oocysts were not detected from mice which were received oocysts heated at 55 deg C for 15 sec, 60degC for 15 sec and 70degC for 5 sec. Consequently, it was clarified that the infectivity of Cryptosporidium oocysts to mice and chickens was lost by heating at 55degC for 30 sec, 60degC for 15 sec and 70degC for 5 sec. |
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AbstractList | The effect of heat treatment was examined against oocysts of Cryptosporidium parvum, Cryptosporidium muris and chicken Cryptosporidium sp. isolated in Japan. The oocysts of these species were exposed at 50, 55, 60 and 70 degrees C for 5, 15, 30 and 60 sec in water bath, respectively. To determine the infectivity of heated oocysts, the nice and chickens were inoculated with the treated oocysts and the oocyst output in the feces after inoculation was examined. In C. parvum and chicken Cryptosporidium sp., the oocysts were not detected from mice or chickens which were received oocysts heated at 55 degrees C for 30 sec, 60 degrees C for 15 sec and 70 degrees C for 5 sec. In C. muris, the oocysts were not detected from mice which were received oocysts heated at 55 degrees C for 15 sec, 60 degrees C for 15 sec and 70 degrees C for 5 sec. Consequently, it was clarified that the infectivity of Cryptosporidium oocysts to mice and chickens was lost by heating at 55 degrees C for 30 sec, 60 degrees C for 15 sec and 70 degrees C for 5 sec. The effect of heat treatment was examined against oocysts of Cryptosporidium parvum, Cryptosporidium muris and chicken Cryptosporidium sp. isolated in Japan. The oocysts of these species were exposed at 50, 55, 60 and 70°C for 5, 15, 30 and 60 sec in water bath, respectively. To determine the infectivity of heated oocysts, the mice and chickens were inoculated with the treated oocysts and the oocyst output in the feces after inoculation was examined. In C. parvum and chicken Cryptosporidium sp., the oocysts were not detected from mice or chickens which were received oocysts heated at 55°C for 30 sec, 60°C for 15 sec and 70°C for 5 sec. In C. muris, the oocysts were not detected from mice which were received oocysts heated at 55°C for 15 sec, 60°C for 15 sec and 70°C for 5 sec. Consequently, it was clarified that the infectivity of Cryptosporidium oocysts to mice and chickens was lost by heating at 55°C for 30 sec, 60°C for 15 sec and 70°C for 5 sec. The effect of heat treatment was examined against oocysts of Cryptosporidium parvum, Cryptosporidium tnuris and chicken Cryptosporidium sp. isolated in Japan. The oocysts of these species were exposed at 50, 55, 60 and 70degC for 5, 15, 30 and 60 sec in water bath, respectively. To determine the infectivity of heated oocysts, the mice and chickens were inoculated with the treated oocysts and the oocyst output in the feces after inoculation was examined. In C. parvum and chicken Cryptosporidium sp., the oocysts were not detected from mice or chickens which were received oocysts heated at 55degC for 30 sec, 60degC for 15 sec and 70degC for 5 sec. In C. muris, the oocysts were not detected from mice which were received oocysts heated at 55 deg C for 15 sec, 60degC for 15 sec and 70degC for 5 sec. Consequently, it was clarified that the infectivity of Cryptosporidium oocysts to mice and chickens was lost by heating at 55degC for 30 sec, 60degC for 15 sec and 70degC for 5 sec. The effect of heat treatment was examined against oocysts of Cryptosporidium parvum, Cryptosporidium muris and chicken Cryptosporidium sp. isolated in Japan. The oocysts of these species were exposed at 50, 55, 60 and 70 degree C for 5, 15, 30 and 60 sec in water bath, respectively. To determine the infectivity of heated oocysts, the mice and chickens were inoculated with the treated oocysts and the oocyst output in the feces after inoculation was examined. In C. parvum and chicken Cryptosporidium sp., the oocysts were not detected from mice or chickens which were received oocysts heated at 55 degree C for 30 sec, 60 degree C for 15 sec and 70 degree C for 5 sec. In C. muris, the oocysts were not detected from mice which were received oocysts heated at 55 degree C for 15 sec, 60 degree C for 15 sec and 70 degree C for 5 sec. Consequently, it was clarified that the infectivity of Cryptosporidium oocysts to mice and chickens was lost by heating at 55 degree C for 30 sec, 60 degree C for 15 sec and 70 degree C for 5 sec. |
Author | Matsui, T Kajima, J Yoshino, Y Tsuji, M Fujino, T. (Kyorin Univ., Hachioji, Tokyo (Japan)) Kobayashi, F Haruki, K |
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Cites_doi | 10.1128/AEM.60.8.2732-2735.1994 10.1292/jvms.62.487 10.11150/kansenshogakuzasshi1970.74.518 10.1080/03079458408418550 10.1056/NEJM198305263082102 10.1292/jvms.63.319 10.7326/0003-4819-103-6-886 10.1056/NEJM199407213310304 10.11150/kansenshogakuzasshi1970.70.132 |
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Snippet | The effect of heat treatment was examined against oocysts of Cryptosporidium parvum, Cryptosporidium tnuris and chicken Cryptosporidium sp. isolated in Japan.... The effect of heat treatment was examined against oocysts of Cryptosporidium parvum, Cryptosporidium muris and chicken Cryptosporidium sp. isolated in Japan.... |
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SubjectTerms | Animals chicken Cryptosporidium CHICKENS Cryptosporidiosis - veterinary CRYPTOSPORIDIUM Cryptosporidium - growth & development Cryptosporidium muris Cryptosporidium parvum Feces - parasitology HEAT Heat treatment Hot Temperature INFECTION Infectivity infectivity of heated oocyst Inoculation Japan Mice Mice, Inbred ICR Mice, SCID Oocysts Oocytes - physiology Poultry Poultry Diseases - parasitology Protozoa Specific Pathogen-Free Organisms |
Title | The effect of heating against Cryptosporidium oocysts |
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