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.

    27/198 page 13
    Pipping. Dipping in an arsenical dipping fluid, combined with thorough hand dressing of the parts to which the dipping fluid does not get access, viz. inside the ears, hairy margins ol the ears, eyelids, under the tail, brush of tail, prepuce in males, etc., is successfully employed for the destruction of ticks; the stock collect the ticks and carry them to the dip, hence the greater the number of dipped stock to the acre the sooner will tick-eradication be effected. It should be borne in mind, however, that game, including small game and vermin, are hosts, and maintain tick life. Dipping, to be effective, should be carefully carried out, and the stockowner is recom¬ mended to peruse the pamphlet on dipping published by the Chief Veterinary Officer, Nairobi. Dipping and hand-dressing is the most reliable method to deal with hast t oast fever. Theoretically, dipping every three days in a three-days’ strength dip, combined with hand- dressing, should control East Coast fever; but in practice, dipping in a seven days’ strength dip at five days’ interval, combined with hand-dressing, is now frequently used and with success. In South Africa, five-days' dipping in a seven days’ strength, combined with hand-dressing, is usually employed, and in addition the cattle are hand-dressed in between the dippings: thus it a beast is dipped and hand-dressed on a certain date it is hand-dressed forty-eight hours later, and ninety-six hours after the original dipping combined with hand-dressing it is again dipped and hand-dressed. The good results of short-interval dipping are due to the iact that an infected tick does not immediately, as stated above, discharge infection the moment it attaches. Hand¬ dressing in between the five-days’ dipping should further reduce the risk of infected ticks discharging infection. It is the custom to hand-dress the cattle after they pass through the dip. Various preparations are used for hand- diessing. In South Africa, Delmore’s proprietary tobacco ex¬ tract is mixed with oil in the proportion of one of tobacco extract to six of oil; this is used with success. Some owners purchase old motor oil for mixing with the tobacco extract, hut precautions should be taken not to use motor oil containing impurities, e.g. acid, paraffin. At the present state of our knowledge, cases of East Coast lever may occur up till fifteen months after the last case, but in practice it is difficult to determine when the last case
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