286 EXPERIMENT STATION RECORD. 



and as such are harmless. The number of animals which become sterile after 

 affection with infectious vaginal catarrh is relatively large. Sterility, however, 

 does not bear a direct relationship to the number of nodules present in the 

 mucous membrane of the vagina of these cases. Most of the sterile cases have 

 well marked changes in the ovaries, uterus, or cervix. 



" Infectious vaginal disease is often combined with infectious abortion. 

 Abortions, however, are not to be attributed to the vaginal disease but are 

 due to the presence of the Bang abortion bacillus. Abortion is often followed 

 by transitory sterility due to retained placenta. On the other hand, the number 

 of cases becoming peruiauently sterile following abortion is relatively small." 



In the bacteriological investigations the author made use of 8 aborted fetuses. 

 In investigations of methods of diagnosing the infection 259 tests were made. 

 "The cause of infectious abortion in cattle is the abortion bacillus of Bang. 

 The abortion organism can be recovered from aborted fetuses. Aborted fetuses 

 show pathological changes which are characteristic of infectious abortion. The 

 agglutination and complement fixation tests are of great help in the diagnosis 

 of this disease. The precipitation test is not i-eliable for the diagnosis of con- 

 tagious abortion. Abortion, likewise, is not a reliable agent in the diagnosis of 

 this infection. In the serum of aborted fetuses agglutinins, precipitins, and 

 bacteriolytic amboceptors of the abortion bacilli are not present. The results 

 of the complement fixation or the agglutination test can not be considered as 

 reliable data upon which to base a prognosis. These tests simply indicate 

 whether the animal has been infected with the Bang organism. An infection 

 may not be followed by an abortion. Immime bodies may simply be formed in 

 the body of the infected animal. These antibodies can be found in the blood 

 in undiminished quantities, 2 years and 10 months after abortion. Infectious 

 vaginal disease has no casual relation to infectious abortion." 



A bibliography accompanies each account. 



Polyarthritis in sheep caused by the swine erysipelas bacillus (Bacillus 

 rhusiopathiae suis), J. Poels {Folia Microhiol. [Delft's, 2 (WIS), No. 1, pp. 1-9, 

 pi. 1). — In the course of his investigations the author found nine sheei) which 

 were suffering fi'om polyarthritis caused by B. rhusiopathice siiis, and thinks 

 that this organism is frequently the cause of the disease. 



Pleuro-pneumonia of goats in the Kangra District, Punjab. India, G. K. 

 Walker (Jour. Compar. Path, and Ther., 21 {IDlJf), No. 1, pp. 68-71).— "The 

 pleuro-pneumonia of goats met with in Kangra appears to be identical with the 

 enzootic pleuro-pneumonia of goats described by Nocard and Leclainche as 

 occurring in Algeria, the Pyrenees, and the Thuringian mountains. The symp- 

 toms and lesions are similar, and the failure to transmit the disease from animal 

 to animal is coincident. 



" The value of the above experiments is depreciated, no doubt, from the fact 

 that plains animals had to be used. If possible further investigations with 

 hill goats will be made with the object of proving the possibility of transmission 

 by means of intrapulmonary inoculation." 



Some common internal parasites (worms) of hogs and their treatment, 

 C. H. Stance (Iowa Sta. OUv. U {1913), pp. 4, figs. 4).— A brief popular 

 account. 



The present status of the hematology of domestic animals, with a report 

 of blood investigations in diseases of the nervous system of the horse, 

 P. ScHROPFEB (Der jetzige Stand dcr Haematologie der Haustiere sowie cinige 

 Blunt untersucJiungcn hci nervosen Erkranknngen des Pferdes. Inaug. Diss., 

 Urm\ Leipsic, 1912, pp. 60). — The first part of this paper (pp. 7-28), consisting 

 of a review of the subject, is followed by a report of personal investigations, 

 including methods, and studies of nine cases of contagious cerebro-spinal menin- 



