Definition of visna in English:

visna

noun ˈvɪznəˈvisnə

mass nounVeterinary Medicine

A fatal disease of sheep in which there is progressive demyelination of neurons in the brain and spinal cord, caused by the maedi virus.
Example sentencesExamples
- It is a voluntary scheme with over 2800 flocks that have been blood tested and are accredited free of Maedi visna.
- We conclude that sheep sera have a visna virus inhibiting factor and hypothesise that VIF inhibits early spread of visna virus in inoculated sheep and may be involved in initiating the persistent infection.

1950s: from Old Norse, 'to wither'.

nounˈvisnə

Veterinary Medicine

A fatal disease of sheep in which there is progressive demyelination of neurons in the brain and spinal cord, caused by a virus.
Example sentencesExamples
- We conclude that sheep sera have a visna virus inhibiting factor and hypothesise that VIF inhibits early spread of visna virus in inoculated sheep and may be involved in initiating the persistent infection.
- It is a voluntary scheme with over 2800 flocks that have been blood tested and are accredited free of Maedi visna.

1950s: from Old Norse, ‘to wither’.

单词	visna
释义	Definition of visna in English: visna noun ˈvɪznəˈvisnə mass nounVeterinary Medicine A fatal disease of sheep in which there is progressive demyelination of neurons in the brain and spinal cord, caused by the maedi virus. Example sentencesExamples It is a voluntary scheme with over 2800 flocks that have been blood tested and are accredited free of Maedi visna. We conclude that sheep sera have a visna virus inhibiting factor and hypothesise that VIF inhibits early spread of visna virus in inoculated sheep and may be involved in initiating the persistent infection. Origin 1950s: from Old Norse, 'to wither'. Definition of visna in US English: visna nounˈvisnə Veterinary Medicine A fatal disease of sheep in which there is progressive demyelination of neurons in the brain and spinal cord, caused by a virus. Example sentencesExamples We conclude that sheep sera have a visna virus inhibiting factor and hypothesise that VIF inhibits early spread of visna virus in inoculated sheep and may be involved in initiating the persistent infection. It is a voluntary scheme with over 2800 flocks that have been blood tested and are accredited free of Maedi visna. Origin 1950s: from Old Norse, ‘to wither’.
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