360 PATHOGENIC YEASTS 



MERCIER'S 1 YEAST 



This yeast was found by Mercier in the Blattes (Periplaneta 

 orientalis) in which the cells existed in the adipose tissue under the 

 form of round units, sometimes oval, with a very finely developed 

 membrane. The parasite grows on bouillon and gelatin media. The 

 colonies are white. The optimum temperature for budding is from 

 22 to 25 C. 



SACCHAROMYCES CONOMELI LIMBATI. Karel Sulc 2 



This yeast has been found by Sulc in the pseudovitellius of an 

 Homoptera Conomelus limbatus. The cells are elliptical or oval, 

 some biscuit shaped having an alveolar content with small meta- 

 chromatic granules in the vacuoles, and a little central or parietal 

 nucleus. The buds form toward the end. The cells are often united 

 two by two. 



Sulc has also found Sack, pseudococci farinosi which lives in the 

 pseudovitellius on another Homoptera, Pseudococcus farinosus. These 

 yeasts probably live symbiotically with the insect. 



A great many other yeasts have been described in different in- 

 fections of men and animals; for instance, Maggiora and Gradenigo 

 have isolated in a case of otitis S. roseus; Domingos Freire has ob- 

 served in a case of yellow fever the presence of Cr. xanthenicus; 

 Flava has found in a case of variola the Cr. albus. On the other hand 

 Goetano has isolated the Cr. septicus which causes a rapid fatal sep- 

 ticemia in guinea pigs. Castellani has described in various tropical 

 blastomyces S. cantliei, Samboni, and Krusei, also Cr. Lowi. San 

 Felice has isolated S. canis I and II which provoke tumors in a dog. 

 Finally, Dangeard has pointed out in the bodies of Anguillules the 

 S. anguillulae which causes in these animals a very deadly malady. 

 However, the morphological and biological characters of these yeasts 

 have not been described; for that reason there will be no description 

 of them at this time. 



1 Mercier, L., Un organisme a forme levure, parasite de la Blatte. C. R. de 

 la Soc. de BioL, v. LX, 1906. 



2 Karel Sulc, Pseudovitellius und ahnliche Gewebe der Homopteren sind 

 wohnstatten symbiotischer Saccharomyceten, Sitzungsberichte der Konig. Bohm. 

 Gesellsch. der Wissenschaften in Prag, March 30, 1910. 



