No. 7. DEPARTMENT OF AGRICULTURE. .ttJ5 



where tissue changes were not characteristic of hog cholera, hogs 

 were inoculated with available material upon the Experimental Farm 

 and the diagnosis was confirmed in several instances in this way. 



Actinoiitijcocis. Five specimens were received. A positive diagno- 

 sis was made following the examination of 3 ; 1 remained negative and 



1 was considered doubtful. The examination was limited to the 

 microscopic examination of smears of the material received. 



Chronic Bacterial Dysentery. A large number of specimens were 

 brought to the laboratory for examination, consisting chiefly of feces 

 and rectal scrapings of individual cattle. These were brought to 

 the laboratory in 20 separate lots including at times feces and rectal 

 scrapings of 60 cattle in one lot. The acid-fast bacilli were demon- 

 strated in the feces and rectal scrapings of 5 cattle, whereupon the 

 diagnosis of chronic bacterial dysentery was made. 



Symptomatic Anthrax Blackleg. Seven specimens were received. 

 In 4 the presence of the bacillus of symptomatic anthrax was demon- 

 strated in the muscle tissue of guinea pigs inoculated with the sus- 

 pected material. An examination failed to give positive results in 



2 instances and in one instance the examinati(m was unsatisfactory. 

 Hemorrhagic fiepticemia. Sections of the internal organs of 8 



cattle were received from the northeastern part of tlie State, suspected 

 of having died of hemorrhagic septicemia. From tlie gioss lesions 

 and the demonstration in the smears of a bipolar ov^al staining or- 

 ganism resembling the bacillus bovo-septicus, a diagnosis of hemorr- 

 hagic septicemia was made in six instances and in one instance the 

 material received could not be examined owing to decomposition. 



Mange. Thirteen specimens of skin scrapings from horses with 

 suspected mange were received. The sarcoptes scabiei was demon- 

 strated in 3 and not demonstrated in 10. 



Milk. Seventeen sets of samples were received during the year. 

 Of these 11 were examined for the number of bacteria per cubic cen- 

 timeter; 4 sets were brought to the laboratory to take part in an ex- 

 periment, and 2 sets were too long in getting to the laboratory and 

 arrived in poor condition. 



Miscellaneous Specimens. These included specimens from 13 

 chickens, 1 duck, parasites from 6 cattle, 5 sheep, 2 dogs, 2 hogs, and 



1 human being; a portion of lung tissue from a cow in which the 

 pneumonic process was caused by an infiltration of the aspergillas 

 I'umigatis ; tumors remoA^ed from 12 horses, 12 dogs, 4 mules, 2 cattle, 



2 chickens, and 1 sheep ; and many other specimens Avhich could not 

 readily be classified. 



The folloAving report of some work personally conducted by the 

 writer upon the eradication of tuberculosis from a large herd is 

 presented herewith: 



