9 2 



TROPICAL MEDICINE AND HYGIENE 



haemolysis is slight, and in which the urine clears, or 

 nearly clears, every twenty-four hours or less, may extend 

 over a week or more without such profound anaemia as 

 occurs in a continuous three-day attack (fig. 30). 



FIG. 28. Blackwater Fever, mild attack: haemoglobinuria less than 

 twenty-four hours. 



FIG. 29. Blackwater Fever, severe attack ; haemoglobinuria, two and 

 a-half days. 



There is usually much mental anxiety, partly on 

 account of the reputation of the disease, but still more 

 because of the large amount of blood-like urine that is 

 being passed. The mental faculties are quite clear, and 

 beyond the debility there is little actual distress. The 

 amount of haemoglobin passed steadily diminishes^ 

 though still sufficient to render the urine opaque. The 



