ioio] VETERINARY MEDICINE. 185 



per cent of iiio samples of milk. The abortus-like bacteria Included seven 



add-produciDg strains which hail never before been found." 



A streptothrix (Nocardia) infection of cows' udders, Alice 0. Evans (Jour. 

 Infect. Discuses, 23 (1918), No. ). pp. 313-316).— During the course of Investi- 

 gations of the bacterial contamination of cow's milk, by the Dairy Division of 



the V. S. Department of Agriculture, begun 4.5 years ago, from 20 to ::h sam- 

 ples of milk from the Dairy Division herd at Beltsvllle, Md., have been a 

 fully examined two or three times each year. 



At the time of the examination in January, 1918, it was found that some 

 time since October, L917, when the preceding examination was made, there 

 had been a general infection of the udders with a streptothrix which was ISO 

 lated from IS of 21 of the samples studied. This organism, which had never 

 before been isolated from the milk of this herd, varied from 140 to 2,600 per 

 cubic centimeter. A search through the literature yielded only two references 

 to the finding of streptothrix in milk. 



A description is given of this streptothrix which is not apparently causing 

 any serious udder trouble. That it may prove pathogenic is suggested. 



Coccidiosis in young calves, T. Smith and H. W. Graybill (Jour. Expt. 

 Med., 28 (1918), No. 1, pp. 89-108, pis. 3).— In the prosecution of certain re- 

 searches upon the diseases of calves in New Jersey coccidiosis, unexpectedly 

 encountered in association with other infectious diseases, led to the studies 

 here reported. 



" Discharges of blood per rectum, associated with oocysts of coccidia, were 

 observed occurring in young calves during the warmer season of the year. In 

 a small percentage of the cases death was probably due directly to the cocci- 

 diosis. Although the disease, known as red dysentery in Switzerland, may 

 have existed in this country for some time, there seems to have been no knowl- 

 edge of its existence and no reports of it have thus far been published. The 

 coccidia have been artificially cultivated and shown to produce four spores. 

 Two oocysts of quite different dimensions and having minor differential char- 

 acters were encountered in the same animal in several instances. 



"The invasion of the epithelium of the small intestine was slight. The chief 

 seat of the parasitism was the large intestine. The lesions following the loss 

 of epithelium were superficial hemorrhages and tilling up of the denuded 

 tubules with polymorphonuclear leucocytes." 



It is further stated that during 1918, up to May 31, but one case of bl 

 dysentery was observed in the same herd. 



Hairless pigs. — The cause and remedy, E. B. Hart find H. Stkenrock [Wis- 

 consin Sta. Bid. 291 (1918), pp. 11, figs. 6). — This is a report of Investigations 

 of which an account has been previously noted (E. S. R., 39, p. 187). 



"Goiter, or an enlarged thyroid gland the function of which is disturbed, is 

 the cause of hairless pigs. Both sow and young are afflicted with enlarged 

 glands. The enlarged glands are deficient in iodin, which is essential to the 

 proper action of this gland and the production of normal young. Iodin sup- 

 plied the female breeding stock during the gestation period will prevetir this 

 trouble. One-third to one-sixth of an ounce of potassium lodld to each 100 lbs. 

 of feed will prevent hairless pigs. Do not use more. 



"Rearing the breeding sows with plenty (2."> per cent) of good roughage. 

 such as alfalfa or clover hay, in the ration and not an excessive amount of 

 protein may do much toward preventing this trouble and thus avoid the neces- 

 sity for using the potassium iodid treatment later." 



Avian tuberculosis in swine, L. E. Dat (Jour. Amrr. Trt. }fcd. Assoc. 5j 

 (1918). No. 2. pp. 92-96).— This report confirms the work of Mohler and Wash- 

 10733S — 19 7 



