]Al 



According to Paillot (1928) Streptococcus pastorianus 

 (which see) is synonymous with Streptococcus hombycis . 



Paillot (1928) gives a complete description of Strepto - 

 coccus "bomb yc is and Bergey's Manual lists it. (5th ed. , 

 p. 353.) 



Paillot, A. 1926 Sur l'etiologie et 1' epidemiologic de 



la gattine du Ver a soie ou "maladie des tetes claires." 



Compt. rend. acad. sci. , 183 , 251. 

 Paillot, A. 1928 Les maladies du Ver a Soie, Grasserie 



et dysenteries. 328 pp. Editions du Service Photo- 



graphique, de 1 'Universite, Lyon. (See pages 171-172; 



195-198. ) 

 *Sartirana, S. , and Paccanaro, A. 1906 Cent, f . Bakt. , 



I abt. , Orig. , kO, 331. 

 Wardle, P. A. 1929 The problems of applied entomology 



587 PP. Manchester Univ. Press, England. (See page 101.) 



Streptococcus d i spar 1 s Glaser 



Insects concerned: The Japanese race of the gypsy moth, 

 Porthetria ( Lyman tria ) dispar ; the silkworm, Bombyx mori; 

 and the army worm, Cirphis unipuncta . 



In 1918, Glaser described an infectious disease of 

 caterpillars of the Japanese race of the gypsy moth which 

 spread to cultures of the American race. It is clinically, 

 pathologically, and etiologically distinct from wilt (a 

 filterahle virus disease). A streptococcus, which Glaser 

 named Streptococcus disparis , was found to "be the cause of 

 the disease. 



The streptococcus is ingested with contaminated food. 

 During the latter stages of the disease and after death it 

 invades practically all the tissues. The symptoms are 

 diarrhoea, loss of appetite- and of muscular coordination. 

 The skin of the dead insect does not rupture as in the case 

 of wilt, though the larv^ hangs in a faccid condition "by 

 its prolegs, and does have the appearance of a caterpillar 

 dead from wilt. 



Streptococcus disparis is a gram positive, non-motile, 

 encapsulated organism with a diameter of less than one 

 micron. 



Successful field experiments were conducted with 

 Streptococcus disparis in sections of the gypsy moth- 

 infected territory in the United States. In two places 

 severe epizootics were produced. The organism is not 

 pathogenic to silkworms ( Bombyx mori) nor to the army worm 



