Airborne Spores of Opportunistic Fungi in the Atmosphere of Cairo, Egypt

Youssef, Youssef A.; El-Din, A. Karam

doi:10.1080/00173138809428933

Cited by 9 publications

(5 citation statements)

References 9 publications

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“…Simple laboratory contamination mnust be ruled out in our cases, as growth of the non-C. neoformans yeasts was consistent in repeat samples, occurred only from sample materials (not, for example, on areas not touched by the loop in streaked agar plates), and was of an intensity uncharacteristic of aerial contamination. Also, although non-C. neoformans cryptococci are generally among the most common airborne contaminants in normal indoor and outdoor air (20,31), they are uncommon in the clinical laboratories involved in this study, which possess modern filtered air systems. A year-round survey of fungi isolated from air in the hospital where our case no.…”

Section: Resultsmentioning

confidence: 96%

Normally saprobic cryptococci isolated from Cryptococcus neoformans infections

et al. 1991

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We report two cases in which Cryptococcus laurentii was isolated from surgically resected pulmonary lesions but the cryptococcal cells in tissue reacted positively with a specific fluorescent antibody (FA) conjugate for Cryptococcus neoformans. Both patients had no apparent host defense defects. In both cases, multiple cryptococcal isolates were obtained from tissue, and yeastlike cells consistent with C. neoformans were seen in direct histology. The isolates were identified by assimilation patterns and standard procedures including phenoloxidase reactions. Since C. laurentii was consistently isolated by using stringent procedures, it was considered unlikely that the fungus represented surgical or laboratory contamination. Its presence may be the result of dual infection not detected by FA, but other possible explanations exist. The results show the value of the FA test in diagnostic mycology and call into question previous reports of cryptococci other than C. neoformans as agents of infection. There have been numerous reports over the years of Cryptococcus species other than C. neoformans causing human infection (Table 1). Isolates in these cases have most often been obtained from body sites which characteristically have been associated with C. neoformans infection. For example, in 6 of 12 published cases, isolates were obtained from cerebrospinal fluid (Table 1) while in 3 other cases, non-C. neoformans isolates were recovered from pulmonary sources. In 11 of the 12 cases, the species isolated was either C. albidus or C. Iaurentii, both of which are commonly isolated from normal skin (14, 17) and indoor and outdoor air (20, 31). Recently, we investigated two cases strongly suggestive of pulmonary infection by C. laurentii. In both instances, while multiple isolates of C. laurentii were obtained from surgically resected lung tissue, C. neoformans was not isolated. Fluorescent antibody staining (FA) techniques, however, indicated that the fungus present in the tissues was C. neoformans. These unusual findings suggest that a reassessment of the literature with respect to infections supposedly caused by Cryptococcus species other than C. neoformans is in order and that the clinical ecology of such infections requires clarification. CASE REPORTS Case 1. Over a 2-year period prior to admission, a 54-yearold woman resident of Ontario, Canada, experienced four

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Section: Resultsmentioning

confidence: 96%

Normally saprobic cryptococci isolated from Cryptococcus neoformans infections

et al. 1991

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“…Se identificaron ocho géneros de hongos: Alternaria, Aspergillus, Cladosporium, Fusarium, Geotrichum, Helminthosporium, Monilia y Penicillium. Todos ellos son hongos saprobios, mesófilos, de distribución cosmopolita, lo que concuerda con lo encontrado en otros estudios, donde estos géneros han sido los más abundantes (Youssef & Karam-El-Din, 1988;Larsen & Gravesen, 1991;Herrero et al, 1996).…”

Section: Resultados Y Discusiónunclassified

Hongos Del Aire De Una Zona Suburbana De La Ciudad De Villahermosa, Tabasco

2014

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Se estudió el tipo y la concentración de esporas de hongos del aire en una zona suburbana de Villahermosa. Los muestreos se realizaron a las 08:00, 13:00 y 18:00 h, una vez por semana durante un año con un impactor de cascada Andersen de seis etapas. Se calculó la concentración de esporas en cada etapa del muestreador. Se aislaron los géneros "Alternaria", "Aspergillus", "Cladosporium", "Fusarium", "Geotrichum", "Helminthosporium", "Monilia", "Penicillium". "Aspergillus" fue el género más abundante. El mayor porcentaje de esporas se capturó en la parte respirable del muestreador.

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“…Youssef and his students and colleagues became interested in medical mycology, serology and fungi affecting human health. For more details see Youssef & Abdou (1967a, b), Hassan et al (1980a–e, 1981), Youssef & Karam El-Din (1988a, b), Karam El-Din et al (1994a–c, 1995, 1996), and Youssef et al (1989, 1992, 1993).…”

Section: Resultsmentioning

confidence: 99%

The history, fungal biodiversity, conservation, and future perspectives for mycology in Egypt

Abdel-Azeem

2010

IMA Fungus

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Records of Egyptian fungi, including lichenized fungi, are scattered through a wide array of journals, books, and dissertations, but preliminary annotated checklists and compilations are not all readily available. This review documents the known available sources and compiles data for more than 197 years of Egyptian mycology. Species richness is analysed numerically with respect to the systematic position and ecology. Values of relative species richness of different systematic and ecological groups in Egypt compared to values of the same groups worldwide, show that our knowledge of Egyptian fungi is fragmentary, especially for certain systematic and ecological groups such as Agaricales, Glomeromycota, and lichenized, nematode-trapping, entomopathogenic, marine, aquatic and coprophilous fungi, and also yeasts. Certain groups have never been studied in Egypt, such as Trichomycetes and black yeasts. By screening available sources of information, it was possible to delineate 2281 taxa belonging to 755 genera of fungi, including 57 myxomycete species as known from Egypt. Only 105 taxa new to science have been described from Egypt, one belonging to Chytridiomycota, 47 to Ascomycota, 55 to anamorphic fungi and one to Basidiomycota.

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Airborne Spores of Opportunistic Fungi in the Atmosphere of Cairo, Egypt

Cited by 9 publications

References 9 publications

Normally saprobic cryptococci isolated from Cryptococcus neoformans infections

Normally saprobic cryptococci isolated from Cryptococcus neoformans infections

Hongos Del Aire De Una Zona Suburbana De La Ciudad De Villahermosa, Tabasco

The history, fungal biodiversity, conservation, and future perspectives for mycology in Egypt

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