EXPERIMENT STATION REPORTS. 



161 



presence of M. pyogenes in all cases. We take these organisms to be 

 secondary invaders. The literatnre is very meager on the subject."' — 

 [Ward Giltner.] 



Granular Vaginitis of Cattle. — "Granular vaginitis is a venereal disease 

 of cattle manifesting itself by congestion and papule formation in the 

 vulvar and vaginal mucosa. A mucopurulent or blood-tinged discharge 

 may accompany the disease especially after service. What is at present 

 known of this disease in Europe and America is well covered in Veteri- 

 nan- Obstetrics by Williams who is at present investigating the trouble. 



It is necessary to differentiate this affection from Bang's epizootic 

 abortion since it is credited with as many as 50 per cent of abortions 

 in an affected herd. It is also guilty of producing at least temporar}^ 

 sterility or failure to breed and since it is frequently accompanied 

 by cystic and other ovarian troubles, it is believed to induce perma- 

 nent sterility. It is in connection with abortion and sterility that our 

 attention has been called to this disease in a number of widely sepa- 

 rated sections of the state. 



After considerable correspondence with Mr. Gilbert Harris, we 

 visited his place at Dryden, October 20, 1910. His herd consisted of 

 IS Jersey cows, 7 heifers and 6 heifer calves in addition to several 

 bulls. Several abortions had occurred, but they were all associated 

 with probably accidental causation. Failure to breed and a chronic 

 vaginal discharge was the cause of complaint. The following table 

 gives a good understanding of the condition of the herd as regards 

 age, number of ealvings, condition of vagina (or vulva), and pregnancy. 



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