Avoidance of Natural Suckling from Dams with Bovine Leukemia Virus Is a Low Priority Countermeasure against Postnatal Transmission

Although natural suckling from dams with bovine leukemia virus (BLV) has not been recommended in Japan, the frequency of BLV transmission through natural suckling under natural conditions is still unclear. The purpose of this study was to elucidate the risk of BLV transmission through natural suckli...

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Autores principales:	Hirohisa Mekata, Eriko Kusuda, Chiho Mori
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	artificial rearing BLV colostrum enzootic bovine leukosis natural suckling postnatal transmission Veterinary medicine SF600-1100
Acceso en línea:	https://doaj.org/article/e50620e06c264f6f8fc55dbe665f66e3
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spelling	oai:doaj.org-article:e50620e06c264f6f8fc55dbe665f66e32021-11-25T19:11:54ZAvoidance of Natural Suckling from Dams with Bovine Leukemia Virus Is a Low Priority Countermeasure against Postnatal Transmission10.3390/vetsci81102552306-7381https://doaj.org/article/e50620e06c264f6f8fc55dbe665f66e32021-10-01T00:00:00Zhttps://www.mdpi.com/2306-7381/8/11/255https://doaj.org/toc/2306-7381Although natural suckling from dams with bovine leukemia virus (BLV) has not been recommended in Japan, the frequency of BLV transmission through natural suckling under natural conditions is still unclear. The purpose of this study was to elucidate the risk of BLV transmission through natural suckling. Dams with BLV were classified into three groups (high, middle, low) based on the proviral loads (PVLs). PCR positivity of their colostrum and the correlations between the ratios of calves with BLV and types of feeding milk were analyzed. In dams with low PVLs, no colostrum or calves were confirmed to have BLV. In dams with middle and high PVLs, 17 out of 25 (68.0%) colostrum were PCR positive, and 10 out of 23 (43.4%) and 13 out of 29 (44.8%) calves with natural suckling and artificial rearing were infected with BLV, respectively. No difference was confirmed between the infection rates of natural-suckled and artificially reared calves. Thus, we concluded that the avoidance of natural suckling from dams with BLV and the introduction of artificial rearing were low priority countermeasures against BLV transmission.Hirohisa MekataEriko KusudaChiho MoriMDPI AGarticleartificial rearingBLVcolostrumenzootic bovine leukosisnatural sucklingpostnatal transmissionVeterinary medicineSF600-1100ENVeterinary Sciences, Vol 8, Iss 255, p 255 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	artificial rearing BLV colostrum enzootic bovine leukosis natural suckling postnatal transmission Veterinary medicine SF600-1100
spellingShingle	artificial rearing BLV colostrum enzootic bovine leukosis natural suckling postnatal transmission Veterinary medicine SF600-1100 Hirohisa Mekata Eriko Kusuda Chiho Mori Avoidance of Natural Suckling from Dams with Bovine Leukemia Virus Is a Low Priority Countermeasure against Postnatal Transmission
description	Although natural suckling from dams with bovine leukemia virus (BLV) has not been recommended in Japan, the frequency of BLV transmission through natural suckling under natural conditions is still unclear. The purpose of this study was to elucidate the risk of BLV transmission through natural suckling. Dams with BLV were classified into three groups (high, middle, low) based on the proviral loads (PVLs). PCR positivity of their colostrum and the correlations between the ratios of calves with BLV and types of feeding milk were analyzed. In dams with low PVLs, no colostrum or calves were confirmed to have BLV. In dams with middle and high PVLs, 17 out of 25 (68.0%) colostrum were PCR positive, and 10 out of 23 (43.4%) and 13 out of 29 (44.8%) calves with natural suckling and artificial rearing were infected with BLV, respectively. No difference was confirmed between the infection rates of natural-suckled and artificially reared calves. Thus, we concluded that the avoidance of natural suckling from dams with BLV and the introduction of artificial rearing were low priority countermeasures against BLV transmission.
format	article
author	Hirohisa Mekata Eriko Kusuda Chiho Mori
author_facet	Hirohisa Mekata Eriko Kusuda Chiho Mori
author_sort	Hirohisa Mekata
title	Avoidance of Natural Suckling from Dams with Bovine Leukemia Virus Is a Low Priority Countermeasure against Postnatal Transmission
title_short	Avoidance of Natural Suckling from Dams with Bovine Leukemia Virus Is a Low Priority Countermeasure against Postnatal Transmission
title_full	Avoidance of Natural Suckling from Dams with Bovine Leukemia Virus Is a Low Priority Countermeasure against Postnatal Transmission
title_fullStr	Avoidance of Natural Suckling from Dams with Bovine Leukemia Virus Is a Low Priority Countermeasure against Postnatal Transmission
title_full_unstemmed	Avoidance of Natural Suckling from Dams with Bovine Leukemia Virus Is a Low Priority Countermeasure against Postnatal Transmission
title_sort	avoidance of natural suckling from dams with bovine leukemia virus is a low priority countermeasure against postnatal transmission
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/e50620e06c264f6f8fc55dbe665f66e3
work_keys_str_mv	AT hirohisamekata avoidanceofnaturalsucklingfromdamswithbovineleukemiavirusisalowprioritycountermeasureagainstpostnataltransmission AT erikokusuda avoidanceofnaturalsucklingfromdamswithbovineleukemiavirusisalowprioritycountermeasureagainstpostnataltransmission AT chihomori avoidanceofnaturalsucklingfromdamswithbovineleukemiavirusisalowprioritycountermeasureagainstpostnataltransmission
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Avoidance of Natural Suckling from Dams with Bovine Leukemia Virus Is a Low Priority Countermeasure against Postnatal Transmission

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