Annales de Parasitologie (P aris), t. 4 4 , 1969, n° 6, pp. 785 Le parasitisme du poumon des petits mammifères par Emmonsia crescens, Emmons et Jellison 1960, est parfois facilement décelable, macroscopiquement, ou par simple examen à la loupe binoculaire du viscère entier. De nombreuses spores (*) C o m m u n ic a tio n p ré se n té e au x J o u rn é e s d e la S o ciété fra n ç a ise de M ycologie m édicale, N a n te s , 23 et 24 m ai 1969.
The comparative study of the responses of 22 strains of Emmonsia to different temperatures between 5 degrees and 40 degrees C allowed us to confirm the existence of thermophilic and non-thermophilic strains. 11 strains composed a very homogeneous non-thermophilic group: their growth, maximal at 20-25 degress C was almost completely inhibited above 30 degrees and they produced characteristic adiaspores at 35 degrees. The remaining 11 strains composed a thermophilic group: their growth was maximal at 25 degrees except for 57 (30-35 degrees), the growth of U.A.M.H. 139 was inhibited at 35 degrees, the others were inhibited at 40 degrees except for three which still continued to develop slowly. Microscopically they produced more or less degenerate chlamydospores at 40 degrees and few adiaspores.
The 22 strains of Emmonsia Ciferri & Montemartini 1959, inoculated intranasally to laboratory mice are not equally virulent. One month after the inoculation, 15 of the strains had produced adiaspores 120 t9 190 micrometer in diameter in the lung. Another strain produced adiaspores measuring 44 micrometer and 2 others measuring 20 micrometer or 10 micrometer. The remaining 4 strains did not develop in the lung tissue. Four thermophilic strains, which in vitro have adiaspores measuring 8 to 15 micrometer, had adiaspores reaching 120-180 micrometer in vivo. Neither budding nor endosporulation could be observed in any adiaspore.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.