Dynamics (seasonal and intra-diurnal) of air-borne fungal spore population of Doha area, Qatar

Fayad, Raghdaa K.

doi:10.5339/qproc.2016.qulss.19

Cited by 2 publications

(6 citation statements)

References 126 publications

(231 reference statements)

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“…This finding leads to the belief that there is no unique pattern for the seasonal presence of Cladosporium spores in the atmosphere, and it probably depends on the environmental conditions prevailing in the geographic area in question (Picornell et al, 2022). In Doha, Qatar, Al-Subai (2002 and Fayad (2016) detected two peaks for Cladosporium spores using a different methodology, the first one in April-May and, the second, in January-February, while for Alternaria the peak was detected in July, which was different from what we detected in Al Khor city for both spore types.…”

Section: Discussioncontrasting

confidence: 71%

“…Probably, the combination of both effects, together with other environmental parameters, and the different sampling methods, determine its influence. In Doha, Qatar, wind speed was associated with higher fungal colony counts (Al-Subai, 2002;Fayad, 2016). However, it is difficult to study the influence of the different parameters on fungal spore concentrations, separately, because fungi respond to the combination of a series of environmental and physiological conditions.…”

Section: Discussionmentioning

confidence: 99%

“…Fluctuations of airborne mycoflora using volumetric methods have been previously conducted in several cities of Saudi Arabia (Hasnain et al, 1998(Hasnain et al, , 2005, Kuwait (Davies, 1969;Halwagy 1994;Khan et al, 1999), Palestine (Waisel et al, 1997), andJordan (Abu-Dieyeh et al 2010;Abu-Dieyeh and Barham, 2014), where Cladosporium and Alternaria were cited among the commonest and most abundant fungal spores outdoors. In Qatar, two aeromycological studies have been previously conducted, from March 1997to March 1998(Al-Subai, 2002, and from April 2015 to March 2016 (Fayad, 2016) using gravimetric methodology and agar Petri dishes and both showed the predominance of Cladosporium and Alternaria in Doha city.…”

Section: Introductionmentioning

confidence: 99%

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First volumetric records of airborne Cladosporium and Alternaria spores in the atmosphere of Al Khor (northern Qatar): a preliminary survey

et al. 2022

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Daily monitoring of airborne fungal spores was carried out for the first time in Al Khor city, Qatar, using a Hirst type 7-day recording volumetric spore trap, from May 2017 to May 2019. During the sampling period, the annual and monthly fluctuations, as well as intradiurnal variations of airborne fungal spore concentrations, were evaluated. Cladosporium, followed by Alternaria, were the spore types most abundant in the atmosphere of the city, with a strong interannual variability in the atmospheric concentrations being observed. The Annual Spore Integrals (ASIns) were 3334 and 1172 spore * day/m3 (2017–2018), and 6796 and 1538 spore * day/m3 (2018–2019) for Cladosporium and Alternaria, respectively. Total daily spore concentrations showed significantly positive correlations with mean, minimum, and maximum temperatures but significantly negative correlations with relative humidity. However, due to the scarce rainfalls’ days, we did not find a statistically significant correlations between Cladosporium and Alternaria spore concentrations and this parameter. Despite this, the spore peaks were strongly related to precipitations that occurred during the previous month. In general, no significant correlations were found with wind speed but, regarding wind direction, the higher percentage of spores were collected when wind blows from the 4th quadrant (NW). According to the intradiurnal pattern, Cladosporium fungal spores displayed their maximum daily concentration during 8:00–10:00 h in the morning, with a second peak in the afternoon, while for Alternaria, the maximum peaks were observed between 08:00 and 14:00 h. Because no consistent previous aerobiological studies exist from Qatar, the aim of this study is to define the seasonality and intradiurnal behaviour of these two airborne fungal spore and the role that, in such arid scene, the meteorological parameters play on the spore concentrations.

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Section: Discussioncontrasting

confidence: 71%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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First volumetric records of airborne Cladosporium and Alternaria spores in the atmosphere of Al Khor (northern Qatar): a preliminary survey

et al. 2022

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“…This study finding was similar to earlier studies. 18,28 But humidity has a positive correlation to indoor fungal load. 34 Temperature and RH are two significant variables in the generation, release, and dispersal of fungal spores, especially indoor environments 35 and the influence of meteorological parameters (ie, humidity) on bioaerosol formation and dispersion.…”

Section: Discussionmentioning

confidence: 99%

“…The results of this study are compliant with other study findings. 1,6,7,27,28 The possible explanation could be due to air movements favoring the maintenance of microorganisms in the aerial media while their deposition owing to their small size is hardly influenced by gravity. Determinants of microbial survival and abundance are factors such as moisture, light, and nutrient accessibility.…”

Section: Discussionmentioning

confidence: 99%

Assessment of Airborne Culturable Fungal Load in an Indoor Environment of Dormitory Rooms: The Case of University of Gondar Student’s Dormitory Rooms, Northwest Ethiopia

Andualem

Ayenew

Ababu

et al. 2020

Air, Soil and Water Research

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Pollution caused by fungal contamination on building materials contributes to poor indoor air quality. Fungi are known to cause several health-related problems, such as acute toxicity, hypersensitivity, invasive mycoses, and respiratory problems. Thus, this study aimed to determine the load and diversity of airborne culturable fungi in the dormitory rooms. An institution-based cross-sectional study was conducted from March to June 2019 at the University of Gondar students’ dormitory rooms. Statistical analyses were carried out using Stata/SE 14.0. Spearman ranks correlation was used to assess the correlation of fungal load with indoor physical parameters. The median fungal loads were 250 CFU/m3 and 157 CFU/m3 in the morning and afternoon, respectively. Most commonly identified fungal genera/species were Aspergillus, Penicillium, Alternaria, Fusarium, Candida, Trichophyton, Piedraia, Microsporum, Geotrichum, Saccharomyces, Rhodotorula, Rhizopus, Exophiala, Arthroderma, Cladosporium, Gliocladium, and Botrytis. Formaldehyde ( r = −0.2859, P = .0031), temperature ( r = −0.2153, P = .0274), and CO2 ( r = −0.3785, P = .0001) were negatively correlated with airborne indoor fungal load in the morning and CO2 ( r = 0.3183, P = .0009) and temperature ( r = 0.2046, P = .0363) positively correlated with airborne indoor fungal load in the afternoon. As a conclusion, the airborne fungal load in the dormitory room was intermediate according to the European standard of nonindustrial premises. Substantial action should be taken to reduce the fungal contamination of indoor environments.

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Dynamics (seasonal and intra-diurnal) of air-borne fungal spore population of Doha area, Qatar

Cited by 2 publications

References 126 publications

First volumetric records of airborne Cladosporium and Alternaria spores in the atmosphere of Al Khor (northern Qatar): a preliminary survey

First volumetric records of airborne Cladosporium and Alternaria spores in the atmosphere of Al Khor (northern Qatar): a preliminary survey

Assessment of Airborne Culturable Fungal Load in an Indoor Environment of Dormitory Rooms: The Case of University of Gondar Student’s Dormitory Rooms, Northwest Ethiopia

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