Good vaccine lymph. An inquiry as to what extent it is desirable to employ heifer vaccination, with details of that method / by John Greene.

  • Greene, John.
Date:
1871
Catalogue details

Licence: Public Domain Mark

Credit: Good vaccine lymph. An inquiry as to what extent it is desirable to employ heifer vaccination, with details of that method / by John Greene. Source: Wellcome Collection.

Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.

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    flannel bandage is safely strapped under the body for the double purpose of protecting the pocks from cold and injury. On the fourth day the heifer appears very slightly indisposed, and does not take its food quite so well; at this time a small tubercle is felt beneath the skin in the position of the incisions. On the fifth day the animal is in its usual health, and there is a marked development in the tubercles, but as yet there is no appearance of a true vesicle, notwithstanding which matter can now be taken for vaccination; the slender crust formed by the dried exudation following the origi- nal insertion of lymph is gently removed, and the base of the pock seized and compressed between a pair of forceps; the new virus speedily appears, having a light amber colour, and very speedily becomes viscid in the air. On the sixth day there is more advance towards vesication, the pocks have the characteristic umbilicated appearance and the lymph is more abundant. On the seventh or eighth day, the vesication is complete and a light inflammatory areola is formed around each pock, but it is now too far advanced to give an invariable success in vaccination. The crusts now commence to form, and fall from the 16th to the 18th day, leaving a well marked cicatrix ; but most of the animals are sent back to the country before this stage has arrived.