THE GENUS WCARDIA 



33 



6. Growth initially colorless, producing a 

 yellow-green pigmenl in 2 to I days. 



54. Nocardia turbata 



7. Growth on agar dark brown and even 

 black. 



a. No liquefacl ion of gelal in. 



37. Nocardia nigra 



b. Gelatin liquefied. 



20. Nocardia iron nsis 



s. Crowth consistency soft; aerial my- 

 celium sparse. 



33. Nocardia lutea 

 9. Growth consistency medium; aerial 

 nix celium profuse. 



8. Nocardia blackvx llii 



10. Growth cream-colored to pink; aerial 

 -pikes produced. 



52. Nocardia sumatrat 



11. < Irowt h grayish yellow. 



36. Nocardia maris 



12. Growth yellowish-orange. 



55. Nocardia uniformis 



13. Pigmenl on protein media deep brown. 



44. Nocardia rangoonensis 



14. Pigment on protein media light brown. 



12. Nocardia caviat 

 II. Proteolytic, although some are only 

 weakly proteolytic. 



1. Growth on nutrient agar with rapid 

 formation of unbranched diphtheroid- 

 like rods; no typical cystites; broth 

 turbid. 



1. Nocardia actinomorpha 



2. Growth white, shiny or pale. 



a. Dough-like consistency; breaks up 

 into short rods. 



3. Nocardia alba 



b. Membranous, myceloid growth. 



32. Nocardia listeri 



3. Growth on nutrienl agar with extensive 

 mycelium; simple unbranched rods not 



formed; Cystites present. Broth clear. 



21 . Nocardia flavescens 



4. Growth cream-colored. 



a. Rapid liquefaction of gelatin. 



a 1 . No aerial mycelium. 



25. Nocardia gibsonii 

 1)'. Aerial mycelium scant, white. 



56. A hi a at in upcottii 



b. Slow liquefaction of gelatin. 



17. Nocardia dicksonii 

 .">. Growth rose-colored to brighl red or 

 red-orange. 



24. Nocardia fructift ra 

 6. Growth pink to red. 



Figure 12. N. rubra, election micrograph (Re- 

 produced from: McClung, X. M. First Reg. Conf. 

 Asia and Oceania, Tokyo, 1956). 



a. Gelatin not liquefied. 



2. Nocardia africana 



b. ( '.elat in slowly liquefied or not at all. 



46. Nocardia rubra 



c. Rapid liquefaction of gelatin. 



39. Nocardia panjae 



7. Pigment on protein media light brown; 

 color of growth pink. 



45. Nocardia rhodnii 



8. Growth yellowish to golden brown. 



22. Nocardia fordii 



9. Growth yellow to reddish-brown; solu- 

 ble pigment brown to red. 



30. Nocardia kuroishi 



10. (Irowt h tan to buff-colored. 



23. Nocardia formica 



11. Growth very limited on various media, 

 except potato. 



27. Nocardia hortonensis 



12. Occur in the sea; liquefy agar. 



a. Growth yellow. 



3 l . A oca rdia man mi 



b. ( bowt h yellow-orange. 



7. Nocardia atlantica 



13. Produce nodules on root- of plants. 



5. Nocardia alni 



In addition to the species included in the 

 above classification and described below, 

 many more species of Nocardia have been 

 recorded in the literature, either under this 

 or under oilier generic names. Some are 

 listed in ( !hapter L3, under the incompletely 

 described forms. < Miters are synonyms. There 

 is no question that some of the Streptomyces 

 species described in Chapter 8 could just as 



