Aids to stockowners / by J. Walker.

  • John Walker
Date:
1930
Catalogue details

Licence: In copyright

Credit: Aids to stockowners / by J. Walker. Source: Wellcome Collection.

    62/198 page 44
    As the vaccine cannot be drawn readily into the syringe from the opened bottle, it is convenient to include here a cup or wineglass, into which the vaccine is first poured. It is, however, preferable not to uncork the bottle, but to fill the syringe straight from the bottle. This can be done by pushing a needle through the cork and leaving it in position until the bottle is empty. By attaching the syringe to this needle and inverting the bottle, the vaccine can easily be drawn off. 4. Sterilization of Instruments.—Complete sterilization of the syringe, needles and cup or wineglass before use is of the utmost importance. This is effected by boiling these for at least fifteen minutes in clean water. Prior to sterilization, the needles should first be cleaned by passing through them one of the small pieces of wire provided for the purpose. Test the syringe before use by sucking up some of the boiled water and ejecting it. 5. Operation.—Cattle are best vaccinated on the side of the neck, just in front of the shoulder; here clip the hair off a patch of skin about the size of the hand, and wash the part thoroughly with 2.} per cent carbolic acid (a tablespoon to a pint of water), or some other disinfectant. Take up a fold, and insert the needle and syringe together, pressing with the finger on the skin over the needle, to prevent the vaccine escaping again. fi. Reaction after Vaccination.—The vaccine is absolutely germ-free, and does not contain any markedly toxic substances. As is to be expected therefore, practically no reaction is set up in the animal. There may be a mild fever reaction for the first few days after vaccination, but this will hardly be noticeable. 7. Age at which Cattle arc Susceptible to Blackquarter anil Require to be I acciuated.—From the age of six months to three years, cattle ai’e susceptible to blackquarter, but out¬ side these limits cases occur, especially on heavily infected farms. Usually therefore animals should be vaccinated for the first time at six to nine months, but in the exceptional cases above mentioned it would be advisable to carry out the first inoculation at about three months. 8. immunity Conferred.—As complete immunity is not established for about two weeks after inoculation, and the in¬ cubation period of the disease may vary up to seven days, it
    digitised image 1
    digitised image 2
    digitised image 3