Figures 109-124. — Abnormal and so-called large lymphocytes. 2,470X. 



Figures 109-112: Reactive bjmphocytes with magenta bodies 

 and vacuolization of cytoplasm. 



109 



110 



111 



112 



Vacuolization has begun but nuoleo-cytoplasmic 

 ratio is about like that of a normal lymphocyte. 

 Lymphocyte with leptochromatic type nucleus; slight 

 hypertrophy of nucleus and oytosome. 

 Reactive lymphocyte. Typical lymphocyte nucleus. 

 Magenta bodies and cytoplasmic vacuoles relatively 

 few. 



Typical reactive lymphocyte; hypertrophy of the 

 cell cytoplasm, frayed and vacuolated and con- 

 taining abundant magenta bodies. 



Figures 113-116; Questionable abnormal and reactive 

 lymphocytes. These may be monocytes. 



113 Azurophilic granules, concentrated mostly above 

 the nucleus; lymphocyte type nucleus. 



114 Mixture of azurophilic and magenta bodies. 



115 Magenta bodies and vacuolated and frayed 

 cytoplasm. 



116 Lymphocyte with a few pale magenta bodies. 

 From same slide as the preceding three cells. 



Figures 117-120: Abnormal lymphocytes that show varying 

 degrees of chromophohia of the basichromalin. Same set 

 of slides from which figures 3 and 44-49 were taken. 



117 Lymphocyte with two chromophobio fractures. 



118 Chromophobic areas surrounded by normal basichro- 

 malin. 



119 Normal basichromalin restricted to about one-third 

 of the nucleus. 



120 An almost completely chromophobic nucleus. 



Figures 121-124: So-called large lymphocytes, which are 

 early immature blood cells (blast cells). All found in 

 circulating blood of chickens 4 months to 5 years old. 



121 Delicate reticular nucleus type with nucleolus 

 probably belongs to the erythrocyte or thrombocyte 

 series. 



122 Blast cell; probably belongs to the lymphocyte 



series. 



123 Blast cell; probably belongs to the myelocyte series, 

 although nucleolus is faintly visible. 



124 Blast cell; probably belongs to the erythrocyte or 

 thrombocyte series. 



56 



