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I write in dismay about the photograph shown in Vet Record (13 October 2018, vol 183, p 438) as an advert for the V-Grip tuberculin injector.
I know that it is not currently authorised for APHA use and I appreciate that this is only a demonstration photograph, and therefore presented with marketing and not best practice in mind. However, this photograph does appear to be simulating a real test.
The APHA (http://apha.defra.gov.uk/external-operations-admin/library/documents/tuberculosis/TR314.pdf) and XL Farmcare (TB Testing A Quality Assurance Manual) protocol is very clear:
Sensitivity of the test decreases towards the shoulder. Where handling permits, Official …
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