420 



BIOLOGY OF THE LABORATORY MOUSE 



however, latent infections become apparent, and organisms may be seen 

 in great numbers in the blood after an incubation period varying from i to 

 4 days. The organisms increase in number for 5 or 6 days, then gradually 



Table 4 

 Comparison of Bartonella, Eperythrozoon, and Grahamella* 



* Modified from Bruynoghe and Vassiliadis (34) and Tyzzer and Weinman (298). 



disappear until at the end of 3 weeks they may be found only with diffi- 

 culty (238, 171, 158). Smears of the blood at the height of the infection 

 reveal organisms in connection with a relatively high proportion of the 



