THE GENUS VOCARDIA 



:;i 



Organism: 



man and 



he bodies of 



mimals. 



B. Cultures pign 



Anaerobes, living in absence of 

 oxygen. 



Nocardia ono< robicus 

 Aerobes, <>r microaerophilic 



forms. 



a 2 . Strict aerobes. 



Nocardia lignieresi 

 1)-. Facultative aerobes 

 .1 ( 'ells nonacid fasl 



Nocardia israi h ' 

 b 3 . Cells acid fast. 

 Nocardia muris 

 ited. 

 I. Cultures pigmented violet or blue, the 



pigments diffusing into the substrate. 



1. Well developed substrate mycelium 

 produced, hyphae forming occasional 

 septae and breaking up into long rods, 

 20 to 30 m; colonies form a faint aerial 

 mycelium with straight sporophores ; 

 spores cylindrical. 



Nocardia gabritschewski 



2. No aerial mycelium produced, hyphae 

 or substrate mycelium forming fre- 

 quent septae and breaking up into 

 short rods and cocci. 



Nocardia cyam us 

 II. Red or orange pigment produced. 



1. Mycelium forming occasional septae 

 and breaking up into long rods; some 

 give rise to a faint aerial mycelium and 

 short straight sporophores. 



a. Saprophytes. 



a 1 . Cultures not forming any soluble 

 pigment in medium. 

 Nocardia fructiferi 

 b 1 . ( 'ultures producing a brown sub- 

 stance. 



Nocardia polychromogenes 



b. Parasites living in bodies of man and 

 animals. 



Nocardiafreeri 



2. Hyphae forming frequent septae and 

 breaking up into shorl rod- and COCCi; 

 no aerial mycelium produced. 



a. Saprophytes living on dead sub- 

 <t rates. 



Nocardia ruber 



b. Parasites living in bodies of man 



and animals. 



* See Chapter 2 for description of Actino 

 israelii. 



Figure 11. N. asteroides, strain 730, grown on 

 oil e\t ract agar (Reproduced from: Gordon, R. E. 

 ind Mihm, J. M. J. Bacterid. 7:>: 240, 1958). 



a 1 . Cells acid fast. 



Nocardia asU roides 

 b 1 . Cells nonacid-fast. 



Nocardia variabilis 

 HI. Cultures cit ron-vellow or bright yellow. 



1. Faint aerial mycelium with straight 

 sporophores and cylindrical spores 

 produced. 



a. Saprophj tes. 



Nocardia flavescens 



b. Parasites. 



Nocardia somalit nsis ' 



2. No aerial mycelium produced. 



a. Saprophytes. 



a 1 . Cultures yellow or bright yellow. 



Nocardia flaws 

 b 1 . Cultures cit ron-vellow . 



Nocardia citreus 



b. Parasites. 



a 1 . Cells acid fast. 



Nocardia farcinica 



b 1 . ( 'ells nonacid fa-t . 



Nocardia putoriat 



IV. Cultures pigmented green. 



1. Saprophytes. 



Somalia I iriilis 



2. Parasites. 



Nocardia /"/"</< n< s 



V. ( 'lilt lires black. 



1 . Sapropl 



\ ocardia niger 



2. Parasites. 



Nocardia s< ndaiensis 



' Now recognized as a S 



