RESUMEN
Elaphomyces compleximurus sp. nov. and E. digitatus sp. nov. are described from the Pakaraima Mountains of Guyana. Macromorphological, micromorphological, habitat and DNA sequence data are provided for each new species. This is the first report of Elaphomyces ascomata associated with ectomycorrhizal members of the Fabaceae and also for the genus from the lowland South American tropics.
Asunto(s)
Eurotiales/clasificación , Micorrizas/clasificación , ADN de Hongos/genética , ADN Ribosómico/genética , Ecosistema , Eurotiales/genética , Eurotiales/ultraestructura , Guyana , Micorrizas/genética , Micorrizas/ultraestructura , Análisis de Secuencia de ADN/métodos , Clima TropicalRESUMEN
Petromyces alliaceus Malloch and Cain is the only known sexually reproducing fungus classified in Aspergillus section Flavi. The goal of this research was to identify culture media and sources of nitrogen that best support the formation of stromata with ascocarps. Three cultures of P. alliaceus isolated from crop field soils were grown on selected agar media in Petri dishes for 7 months at 30 degrees C in darkness. The largest numbers of stromata were recorded for cultures grown on Czapek's agar (CZA) and a mixed cereal agar (MCA), while the percentage of stromata containing ascocarps was greatest (PAsunto(s)
Aspergillus flavus/crecimiento & desarrollo
, Medios de Cultivo
, Eurotiales/crecimiento & desarrollo
, Nitrógeno/metabolismo
, Aspergillus flavus/genética
, Aspergillus flavus/ultraestructura
, Eurotiales/genética
, Eurotiales/ultraestructura
RESUMEN
We report a case of invasive pulmonary aspergillosis caused by Neosartorya pseudofischeri S. W. Peterson [anamorph Aspergillus thermomutatus (Paden) S. W. Peterson]. The diagnosis was initially based on a positive blood culture for a strain isolated from a neutropenic patient by means of a BACTEC 9050 blood culture system. The final diagnosis was established based on X-ray and computer tomography scan results as well as the detection of Aspergillus antigen in the patient's serum.
Asunto(s)
Aspergilosis/diagnóstico , Eurotiales/aislamiento & purificación , Enfermedades Pulmonares/microbiología , Adolescente , Aspergilosis/sangre , Eurotiales/genética , Eurotiales/fisiología , Eurotiales/ultraestructura , Enfermedad de Hodgkin/complicaciones , Enfermedad de Hodgkin/microbiología , Humanos , Masculino , Microscopía Electrónica de Rastreo , Datos de Secuencia Molecular , Esporas Fúngicas , Tomografía Computarizada por Rayos XRESUMEN
A filamentous fungus that caused a fatal systemic infection in a dog has been identified as the new species Sagenomella chlamydospora. When the case was initially reported, the fungus was identified as Paecilomyces sp. This study emphasizes how difficult can be the identification of the causative agent of an infection when an uncommon microorganism is involved. This is the first time that this genus has been involved in animal infections, including humans.