Bacillary white diarrhea / by Thomas Dalling.

  • Dalling, Thomas.
Date:
[1927?]
Catalogue details

Licence: In copyright

Credit: Bacillary white diarrhea / by Thomas Dalling. Source: Wellcome Collection.

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    Bacillary White Diarrhoea By Thomas Dalling HE question of poultry diseases was never so acute as it is to-day. The successful rearing of any stock must be governed to a large extent by an intimate knowledge of the diseases affect- it, because from such knowledge one is in a position to control ►reaks and to adopt measures for prevention and cure. Poultry ng has assumed large dimensions, and with the increase in the iber of birds kept, the disease rate has mounted up till at the ent time disease is increasing at an alarming rate especially ng large flocks in the country. As the industry on a commercial i is comparatively new, it follows that many disease questions i not been studied thoroughly, so that, although some knowledge been gained by the few investigators who have looked ahead made poultry diseases one of their studies, we are not in the same tion to deal with diseases of poultry as we are with relation to y diseases of human beings and other animals. The position to-day is that fowl diseases are rampant, that many he best flocks in the country are seriously affected, possibly in e cases without the owner’s knowledge, and that disease is being :ad broadcast because of our lack of knowledge of, or our indiffer- | to, the methods by which such spread is taking place. Of all the diseases affecting poultry in this country, Bacillary te Diarrhoea occupies the foremost position in severity. Much istigation has been carried out into its cause and prevention and, oily, much can now be done to prevent its spread and ultimately radicate it from a flock of breeding fowls. All poultry farmers read the various poultry journals must be familiar with the ortant points in connection with B.W.D. It may be useful, tever, to sum up the available knowledge under three heads :— cause, method of infection and spread ; (2) “ carrier ” hens and is, and (3) how to handle an outbreak. use, method of Infection and Spread. The cause of B.W.D. was shown, by Rettger and Harvey work- in America in 1908, to be a minute organism or germ which has l named Bacillus pullorum. Since the actual cause was overed many investigators in America and in this country have ied B.W.D. so that at the present time we are well acquainted i the salient features of the organism and how it infects chicks, affected chicks do not die—some may recover : unfortunately a a disease aspect these are more important and may cause much Lter ultimate loss than if they had died, because they have the rer of transmitting B.W.D. to their offspring. If female chicks infected and recover, the organism locates itself in the ovary especially in some of the yolks of the eggs which will eventually aid when the bird reaches maturity. In this way is the disease nly spread. Fowls capable of transmitting B.W.D. by this hod are called “ carriers.” Young male chicks may also be cted and recover. The organism locates itself in the male