2I 4 
To Investigate European Malaria 
i. Examine the blood of as many Europeans 
as possible. Enquire carefully whether the person is 
taking quinine at the time, also take the temperature. 
(i) The number shewing parasites or crescents. 
(ii) The presence of pigmented leucocytes. 
(iii) The presence of an increase of the large 
mononuclear leucocytes. 
In every case make a differential count of the 
leucocytes and keep the record. 
Observe especially, any community of Europeans 
shewing a larger percentage than usual of malarial 
infection. Note the conditions under which these 
are living, and note also the probable greater prevalence 
of blackwater fever in these communities, e.g., Roman 
Catholic Fathers, West African miners, railway com¬ 
munities, Europeans in poor circumstances living in 
the slums of native towns, etc., Syrian hawkers, etc. 
Note those communities habitually taking quinine. 
Fig. 70 . Shews how Europeans are injected with Malaria 
from the native ( children ) 
