BLOOD DISEASES 135 



Lymphocytes 2 per cent 



Large monociilear cells 30 per cent 



Mast cells per cent 



Mononuclear myelocyte with eosinophilic granules 52 per cent 



Unclassified cells 8 per cent 



100 per cent 



It is associated by an iiifiltratioii of large mononuclear leu- 

 kocytes. Atrophy of the bone marrow is noted. There is noted 

 an accumulation of wliite blood cells in the bone marrow, 

 spleen and liver. The bone marrow appears greyish-red in 

 color. 



Treatment. — Prompt isolation of the well from the sick 

 l)irds and sanitary measures as given for fowl cholera should 

 be observed. 



SLEEPING SICKNESS OF CHICKENS 



This disease is due to a gram-positive encapsulated strep- 

 tococcus. As prominent symptoms there is noted reddened 

 and swollen conjunctiva. The bird appears "droopy" and 

 drowsy. The comb and wattles appear pale. There is a diar- 

 rhea and emaciation rapidly ensues. 



SEPTICEMIC DISEASES OF CANARY BIRDS 



Septicemia of Canary Birds 



This disease is due to a motile bacillus. The cultures on 

 potatoes are a characteristic yellowish-grey. As a prominent 

 symptom there is noted a soot-like discoloration of the skin. 

 At autopsj^ there is noted small necrotic foci in the liver. 



Cholera of Canary Birds 



This disease is due to a non-motile bacillus. It does not take 

 the polar staining. In cultures it produces fetid gases. On 

 potato it produces yellowish colonies. It is very fatal run- 

 ning a rapid course. Chickens and pigeons inoculated with 

 the pure culture succumb to the disease. 



Infectious Necrosis of Canary Birds 



The bird appears droopy with loss of appetite. Singing 

 birds cease to sing and remain quiet on the perch. Upon 

 examination of the mouth cavity dii)htheric areas are noted. 

 On autopsy small necrotic areas are noted in the liver and 

 spleen. The germ is a short non-motile Gram-negative bacillus. 



Typhoid of Canary Birds 



This disease is due to a ])acillus of the enteritidis group. 

 The prominent symptoms are those of debility, difficult respi- 



