894 MANUAL OF DETERMINATIVE BACTERIOLOGY 



A. Initial mycelium well developed, richly branching, dividing into rods and 



generally into cocci. 



1. Vegetative mycelium soft, without macroscopically visible aerial 



mycelium, 

 a. Vegetative mycelium yellow, orange or red. 

 b. Pathogenic. 



c. Vegetative mycelium white, buff, or pale yellow. 



1. Nocardia farcinica. 

 cc. Vegetative mycelium yellow to red. 



2. Nocardia asteroides. 

 bb. Not pathogenic. 



3. Nocardia polychromogenes . 

 aa. Vegetative mycelium white to pink. 



b. Gelatin not liquefied. 



c. Growth on nutrient agar opaque, cream-colored; 

 coccoid forms in broth. 



4. Nocardia opaca. 



cc. Growth on nutrient agar watery, no coccoid forms in 

 broth. 



5. Nocardia eryihropolis. 

 ccc. Growth on nutrient agar pink. 



d. White aerial mycelium on milk. 



6. Nocardia leishmanii . ■ 

 dd. Pink pellicle on milk. 



7. Nocardia caprae. 

 ddd. Yellow pellicle on milk. 



8. Nocardia preloriana. 

 bb. Gelatin liquefied. 



9. Nocardia pulmonalis. 



2. Vegetative mycelium hard, yellow, with white aerial mycelium ; hyphae 



divide into chains of acid-fast cocci. 



10. Nocardia paraffinae. 



B. Initial mycelium very short, rapidly dividing into rods and cocci. 



1. Slowly growing organisms; cells 0.5 to 0.7 micron in diameter. 



11. Nocardia minima. 



2. Rapidly growing organisms; cells 1.0 to 1.2 microns in diameter. 



a. Growth pink. 



b. Cystites (swollen cells) not formed, 

 c. No indigotin from indole. 



12. Nocardia corallina. 

 cc. Indigotin from indole. 



13. Nocardia globerula. 

 bb. Cystites formed. 



14. Nocardia salmonicolor . 

 aa. Growth coral red. 



15. Nocardia rubroperlincia. 

 aaa. Growth dark red. 



16. Nocardia rubra. 

 aaaa. Growth white. 



b. No aerial mycelium. 



17. Nocardia coeliaca. 

 bb. Aerial mycelium. 



18. Nocardia transvalensis . 



