26 N. H. Agr. Experiment Station [Bulletin 280 



Two Tests for PuUorum Disease Compared 



That the rapid whole-blood test for pullorum disease is not as ac- 

 curate as the standard tube method is indicated by comparative work 

 on 242 birds, about 30 of which reacted to the tests. This investi- 

 gation was conducted by C. A. Bottorff. {Miscellaneous Income) 



Inoculation Not Practical for Coccidiosis 



Three lots of chickens were inoculated at different ages with E. ten- 

 ella in the studies of control of coccidiosis of poultry. Those which 

 survived the initial inoculations showed immunity to E. tenella on later 

 inoculations. Getting the correct dosage of the inoculant was difficult. 

 Mortality was so high that even though immunity was produced, this 

 method does not seem advisable under practical conditions, in the 

 opinion of the investigators, C. L. Martin, C. A. Bottorff, and T. B. 

 Charles. 



In the study of control agents five groups of chickens were inocu- 

 lated and as soon as definite symptoms developed four groups were 

 treated and the fifth used as a control group. Epsom salts, baking 

 soda, 40 per cent milk mash, and enteritis powder were used. 



The best results were obtained from the use of Epsom salts given 

 in drinking water at the rate of one pound to 500 pounds live weight 

 of chicks. This treatment gave the quickest action and less mortality. 

 Baking soda and 40 per cent milk mash were on a par, and much 

 better than the enteritis powder. (Piirnell Fund) 



Control Studies on Contagious Abortion Gives Results 



Six herds, one dispersed, were used by C. L. Martin in practical 

 field testing for control of contagious abortion in cattle by the agglu- 

 tination test. 



The university dairy herd consisting of 90 head continued to remain 

 negative to the Bang's disease agglutination test, as it has since Janu- 

 aiy 1929, when one reactor was found and eliminated. 



Of the other five herds, four have been improved by isolation and 

 elimination of reactors. 



A total of 3,450 samples of blood were tested for Bang's disease by 

 G. L. Martin, 2,615 of them coming mainly from practicing veteri- 

 narians in New Hampshire and the remainder from herds in Vermont, 

 Maine and Massachusetts. In general herds tested for the first time 

 show the animals about equally divided among positive, suspicious, and 

 negative classifications. [Puimell Fund) 



One-Fifth of Poultry Tested for Pullorum 



During the testing season from July 1, 1932, to June 30, 1933, 

 239,397 samples from 212,363 birds were tested for pullorum disease 

 by G. A. Bottorff. This is more than one-fifth of the total number of 

 adult birds in New Hampshire, and of these birds tested 99.54 per 

 cent were found to be free from the disease. 



