58 
BACTERIOLOGY. 
age of the patient and the amount of serum withdrawn. 
In children io to 20 cubic centimeters may be given, in 
adults 30 to 40 cubic centimeters. It is unsafe, how¬ 
ever, to give more serum than is removed by lumbar 
puncture. 
The Micrococcus catarrhalis closely resembles 
the Meningococcus, but is much easier to cultivate and 
grow at room temperature. It is found in the nasal 
secretions of healthy people and is probably respon¬ 
sible for nasal and bronchial infections similar to in¬ 
fluenza. It has been the cause of epidemic con¬ 
junctivitis. 
