22 N. H. Agric. Experiment Station [Bui. 270 



can be produced by natural inoculations and to learn the value of 

 sanitation as a control. 



For quick relief when coccidiosis is causing bloody droppings, Epsom 

 salts seems most effective. If the disease has progressed only to the 

 point where the birds present a droopy appearance, 40-per-cent milk 

 mash, Epsom salts, soda, molasses, enteritis powder and some com- 

 mercial preparations are equally satisfactory in cleaning out the in- 

 fection. {Purnell Fund) 



Fowl-Pox Vaccine Needs Refrigeration 



Fowl-pox virus in ground and unground scabs becomes practically 

 worthless if stored at room temperature for eight months, find C. L. 

 ]\laitin and C. A. Bottorff. At refrigerator temperature it will remain 

 potent. Air-tight containers were used. {Purnell Fund) 



Fowl-pox vaccine totaling 109,000 doses was distributed to New 

 Hampshire poultrymen. The figure for a year ago is 67,330. Poultry 

 growers in seven other states and Canada requested 18,175 doses. 

 {Miscellaneous Income) . 



Contagious Abortion Eradicated 



Six years of practical field testing indicate that contagious abortion 

 in cattle can be economically controlled and eradicated by means of 

 the agglutination or blood test, strict isolation of reactors, and thor- 

 ough sanitation. In this project C. L. Martin is testing seven herds 

 regularly. {Purnell Fund) 



Of the 2,599 samples tested for Bang's disease, 2,197 were from New 

 Hampshire herds and showed an infection of 13.8 per cent and sus- 

 picious reaction of 5.4 per cent. The samples came mainly from prac- 

 ticing veterinarians. {Miscellaneous Income) 



Poultry Diagnoses Show Drop in Pneumonia 



The leading ailments of adult birds in 1931-32 were coccidiosis, rup- 

 tured egg yolks, round worms, pneumonia and indigestion, according 

 to 1,741 poultry autopsies made by C. L. Martin and C. A. Bottorff. 

 Out-of-state specimens numbered 258. 



Topping the list of difficulties of chickens was pullorum disease, 

 with pneumonia second, followed by coccidiosis, indigestion, and 

 rickets. Pullorum disease and pneumonia reversed their order as com- 

 pared with 1930-31, not due to any increase in the former but to a 

 drop in the number of pneumonia cases from 603 to 223. This de- 

 crease is credited to better brooding management. 



Examinations were made of 350 large animals by C. L. Martin; the 

 majority came from the college of agriculture and a few were sent in 

 by veterinarians throughout the state. {State Fund) 



Eradication of Pullorum Disease 



From two to eight monthly tests are necessary to eradicate Pullo- 

 rum disease from poultry flocks, according to results of work on six 

 farms by C. A. Bottorff. He also studied the effect of housing 16 

 non-reacting pullets with one strongly-reacting cockerel; after about 



