368 Microbes and You 



infect adjacent tissues. Hyphae are not formed when this fungus 

 is growing in vivo. 



A test similar to the tubercuHn test has been developed to de- 

 tect persons who have the disease or who have had the infection. 

 In extensive tests conducted in the southwestern part of the United 

 States it has been found that a high percentage of residents in these 

 areas react with a positive coccidioidin reaction. 



