Seasonal variations of fungi of outdoor air and sedimented dust at Assiut region, Upper Egypt

Abdel‐Hafez, S. I. I.; Moubasher, A. H.; Barakat, Ahmed

doi:10.1080/00173139309429462

Cited by 9 publications

(6 citation statements)

References 21 publications

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“…Levetin and Hurewitz (1978) have reported Penicillium percentage varying from 5.0 to 41.7 in different homes with a mean of 21.1% in the air inside homes. P. chrysogenum, P. citrinum, and P. oxalicum were the dominant species in the study of Abdel Hafez et al (1993). The dominance of these species was also observed in the present investigation (Table 4).…”

Section: Penicillium Concentrationsupporting

confidence: 82%

“…Penicillium percentage in the air inside homes differed in different season and it was low in summer in a study of Levetin and Hurewitz (1978). The maximum isolation of Penicillium has been earlier reported in the months with low mean temperatures (Larsen and Gravesen, 1991;Abdel Hafez et al, 1993). This can be explained by the fact that Penicillium requires cooler climate and high humidity (Mehrotra, 1983), which is usually available in the winter season in Nagpur.…”

Section: Penicillium Concentrationmentioning

confidence: 86%

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A report on Penicillium in the intramural and extramural air of residential areas of Nagpur city (India)

Sawane

Saoji

2004

Aerobiologia

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Prevalence of different species of Penicillium and their concentrations per cubic meter of air were evaluated with the use of Hi-Air sampler system Mark II (Hi-Media Laboratories Ltd., India) in the air of homes (bed-rooms) at four different sites in Nagpur. At each of these sites, air sampling was done fortnightly in triplicate for 2 years duration from June 2000 to May 2002. The sampling was also done in triplicate for the outdoor air in the vicinity of each home on the same day immediately after the indoor sampling was over. The mean concentration of Penicillium colony forming units at four different sites in the indoor air was 32, 46.9, 35 and 35.4 CFU/m 3 , respectively, whereas in the outdoor air at these same four sites, the mean concentration was 24, 28, 25 and 25.8 CFU/m 3 respectively. The Penicillium concentration in the indoor air was found to be higher in winter than in other seasons (ANOVA, p < 0.05). Concentration of Penicillium spp. in intramural environment was always higher than that in extramural environment. Statistically significant difference existed between intramural and extramural environments at all the sites, with maximum difference at a site, which is old crowded area of the city. During the 2-year's investigations, 11 species of Penicillium were isolated from the indoor air while nine species were isolated from the air outside the homes. The dominant species of Penicillium in indoor as well as outdoor air were P. citrinum (33.78 and 32.81%), P. oxalicum (19.70 and 22.60%), and P. chrysogenum (17.64 and 14.50%). The percentage of the Penicillium in the indoor air was 10.70 while it was 8.36 in outdoor air. Indoor air showed the presence of P. glaber and P. sclerotiorum, which were absent in the outdoor air.

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Section: Penicillium Concentrationsupporting

confidence: 82%

Section: Penicillium Concentrationmentioning

confidence: 86%

A report on Penicillium in the intramural and extramural air of residential areas of Nagpur city (India)

Sawane

Saoji

2004

Aerobiologia

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“…From August 2001 to January 2002, culturable airborne microfungi and bacteria were collected from 5 schools in the city of Edirne using the Petri Plate Gravitational Settling Method [20][21][22][23][24][25]. Sampling was undertaken in three sites in each primary school: classroom, corridor and canteen (Table 1).…”

Section: Sampling Isolation Methods and Identificationmentioning

confidence: 99%

Monitoring of Fungi and Bacteria in the Indoor Air of Primary Schools in Edirne City, Turkey

Aydoğdu¹,

Asan

Otkun

et al. 2005

Indoor and Built Environment

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We monitored levels of bacteria and fungi in the indoor air at selected sites of several public primary schools in the city of Edirne, Turkey. Sampling was by the Petri plate method onto both a Rose-Bengal streptomycin agar medium and a 5% sheep-blood agar medium exposed to the air for 10-minute periods. Samples were collected monthly over a period of 6 months between August 2001 and January 2002. A total of 941 microfungi and 2066 bacterial colonies were counted on 90 Petri plates. During this 6-month period, 19 bacterial genera, 15 fungal genera and 48 species of fungi were isolated from the air in the schools. Some bacteria, such as coagulase-negative Staphylococcus, Corynebacterium and Bacillus, were predominant (42.7%, 20.4% and 6.9% of the total, respectively). Penicillium, Cladosporium and Alternaria were the most common fungal genera (42.8%, 19.3% and 10.1% of the total, respectively). Staphylococcus, Acinetobacter, Corynebacterium, Propionibacterium and Pseudomonas genera were found in every month. Statistical analysis of the data showed a positive correlation between the concentrations of bacteria and air humidity (p 0.002, R2 0.726) and between bacterial concentrations and age of the schools ( p 0.045, R2 0.787). Also, that there was seasonal variation since the concentrations of fungi and bacteria varied according to the months ( p 0.001).

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“…This study revealed that there was a high degree of similarity between the airborne fungal populations and the fungi residing in dust sediments. Many of these fungi are known to be allergenic and have the potential for causing asthma, eye infections, and asthmatic and non-asthmatic pneumonia (Abdel-Hafez, Moubasher, & Barakat, 1993).…”

Section: Pm 10mentioning

confidence: 99%

Transport of microorganisms to Israel during Saharan dust events

2006

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Dust storms are serious meteorological events that affect the East Mediterranean region, primarily during the spring season. The physical and chemical nature of dust storms, their origin, and the meteorological conditions leading to the generation of storms have been fully documented, but knowledge on their biological content is almost nonexistent. Four dust events that occurred in the period 2004-2005 were sampled in Haifa, Israel, an urban area on the East Mediterranean coast, for biological characterization. Samples were taken before or after (depending on the meteorological conditions) as well as during the dust events. Dust particles were collected as two size fractions using a dichotomous sampler, and their elemental content was determined using X-ray fluorescence analyses. Airborne bacteria and fungi were collected with the Six Stage Andersen Viable Impactor. Fungi were identified by optical microscopy. Compared to adjacent clear days, there was an increase in the concentration of both atmospheric particles and elements of geological and marine origin during the dust events. The concentration of airborne microorganisms during the dust events was also higher, and the fungal population content was affected. On a winter clear day the abundant airborne fungi were Paecilomyces variotii, Penicillium glabrum, and Alternaria alternata. On a spring clear day, the persisting airborne fungi were Alternaria alternata, Geotrichum candidum, Penicillium chrysogenum, and P. glabrum. However, during two dust events the fungal population was dominated by Alternaria alternata, Aspergillus fumigatus, A. niger, A. thomii, Cladosporium cladosporioides, Penicillium chrysogenum, and P. griseoroseum. This study suggests that Saharan and other desert dust events in the East Mediterranean have a significant effect on the airborne microbial populations, which might impact on health, agriculture, and ecology.

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Seasonal variations of fungi of outdoor air and sedimented dust at Assiut region, Upper Egypt

Cited by 9 publications

References 21 publications

A report on Penicillium in the intramural and extramural air of residential areas of Nagpur city (India)

A report on Penicillium in the intramural and extramural air of residential areas of Nagpur city (India)

Monitoring of Fungi and Bacteria in the Indoor Air of Primary Schools in Edirne City, Turkey

Transport of microorganisms to Israel during Saharan dust events

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