Residential indoor airborne microbial populations in the United Arab Emirates

Jaffal, A.A.; Banat, Ibrahim M.; Mogheth, A.A. El; Nsanze, H; Bener, Abdülbari; Ameen, A.

doi:10.1016/s0160-4120(97)00055-x

Cited by 42 publications

(34 citation statements)

References 10 publications

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“…and Roseomonas spp. Some of these genera were also found in indoor air in other studies [13,14] of humans and several other mammals. Therefore, it is not surprising that Staphylococcus and Micrococcus were identified to be present on both nurseries and DCCs.…”

Section: Airborne Bacteria Speciessupporting

confidence: 66%

Indoor Airborne Bacteria And Fungi Atdifferent Background Area In Nurseries And Day Care Centres Environments

Shahidah¹,

S.²,

S.³

et al. 2017

J. CleanWAS

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Indoor air quality (IAQ), nursery, day care centre, pathogenic, airborne bacteria and fungi.Respiratory symptoms among children cases increased dramatically was believe due to poor indoor air quality. Nursery and day care centre (DCC) appear to be the site of exposure and transmission of airborne microorganism between children. This study aims to assess the relation between the colony forming unit level of biological contaminant (bacteria and fungi) between urban and suburban location correlate with indoor air quality (IAQ) parameters. Besides, the other aims for this study were to identify the types of an airborne pathogenic microbial contaminant in the nursery and DCC. The airborne microbial sampling was done by using Surface Air System Indoor air Quality (SAS IAQ), which taken at the end of June until early August 2015. This study presents the diversity of indoor airborne bacteria and fungi in the nursery and DCC demonstrated in relation to occupancy, location, and ventilation system. Correlation between bacteria and fungi counts and the other IAQ parameters (temperature, RH, CO2, and CO) was unable to be studied due to instruments limitation. Counts of airborne bacteria and fungi were measured as colony forming units (CFU) grown on agar plates. CFU counts were compared by sampling sessions and sampling locations (babies room, a kindergarten room, and control room). Fluctuations in bacteria and fungi counts in such conditions were observed. Three groups of culturable bacteria were identified: Grampositive cocci, Gram-positive bacilli, and Gram-negative bacteria while five genera of fungi successfully identified were Aspergillus, Penicillium, Rhizopus, MucorandChrysonilia. Certain bacteria isolated from this study were identified at a species level by 16s rRNA amplification including S. haemolyticus, A. baumannii, P. stutzeri, M. osloensis, M. luteus, B. subtilis, Rothia spp., and Roseomonasspp. Overall findings suggest that IAQ level in investigated sites was at poor level due to high bacteria and fungi concentrations with isolation of some opportunistic pathogenic microorganism. This pathogenic microorganism will cause adverse health reaction especially to young children. This study will provide a baseline of hygienic indoor air quality in nursery and day care centre.

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Section: Airborne Bacteria Speciessupporting

confidence: 66%

Indoor Airborne Bacteria And Fungi Atdifferent Background Area In Nurseries And Day Care Centres Environments

Shahidah¹,

S.²,

S.³

et al. 2017

J. CleanWAS

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“…Earlier work in Benin city, Nigeria had shown contamination of hospital indoor both in private and goverment owned hospitals [31]. The concentration of potentially pathogenic organisms in the hospital air was low compared to the concentration of pathogenic bacteria carried out in an European study using an Anderson air sampler, pathogenic bacteria accounted for 30% of all isolates [41], but it included Streptomyces spp as human pathogens but in the study reported by Jaffal et al [40], Streptomyces spp was considered an environmental microorganism. The low concentration of pathogenic organisms in the air could possibly be due to the fact that there was no strong air current to distribute the bacteria from the reservoirs (patients).…”

Section: Discussionmentioning

confidence: 87%

“…Studies on microbial contaminants in indoor air have been recorded [33,38,39,40]. Earlier work in Benin city, Nigeria had shown contamination of hospital indoor both in private and goverment owned hospitals [31].…”

Section: Discussionmentioning

confidence: 99%

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Indoor Airborne Microflora in Various Section of a Tertiary Healthcare Centre in Rural Area of Ovia Northeast Edo State

Aladenika¹,

Olaniyan²

2014

AJIDM

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This study was carried out to determined the variation in microbiota of five section of Igbinedion University Teaching Hospital Okada. Samples were collected using the settled plate techniques for the enumeration of bacterial and fungal isolates. The air specimens were collected three times; in the morning between the hours of 8 am and 10 am, in the afternoon between 12 noon and 2 pm and in the evening between the hours of 4pm and 6pm. The total heterotrophic microbial population of the five different units (wards) studied varied from wards to wards. The highest bacterial population was recorded in the afternoon between time 12 pm and 2 pm compared to the morning and evening, ranging from 5 cfu/m3 to 17 cfu/m3, with the accident and emergency ward recording the highest bacterial counts of 17 cfu/m3. The concentration of fungal population in air of the five different wards also followed the bacteria pattern in which highest fungi population were recorderd in afternoon (16 cfu/m3). At the three different times of study, the Accident and emergency ward, male ward, female ward as well as children wards show high yield fungal isolates. Five bacteria were isolated, namely; Pseudomonas aeruginosa, Staphylococcus aureus, Escherichia coli, Klebsiella aerogenes and Proteus mirabilis and identified accordingly. Aspergillus sp, Penicillum sp, and Mucor sp, were three fungi genera isolated. The degree of frequency of microbial distribution was high in the accident and emergency ward but lower in operating room (theatre). Accident and emergency ward my serve as source of infection in this hospital hence there should be an increase in level of hygiene in this unit also human movement should be limited scince they often serve as souces of pathogen.

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“…[3]- [11] PM 2.5 is potentially of greater concern for human health because the smaller particle size allows them to penetrate deeper into lungs and cause extensive damage. The existing studies lack a systematic identification of the size distribution, elemental and chemical compositions of particulate matter (PM) pollutants.…”

Section: Introductionmentioning

confidence: 99%

Elemental and Chemical Analysis of PM10 and PM2.5 Indoor and Outdoor Pollutants in the UAE

Hamdan¹,

Alawadhi²,

Jisrawi³

2015

IJESD

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Abstract-Knowledge of both the size distribution and elemental composition of different size fractions of aerosol particles is useful not only in providing information about the chemical composition and source apportionment of pollutants, but also in understanding the transformation chemistry of pollutants during transport in the atmosphere. We have used a low pressure-multistage inertial impactor and a double stage low volume sampler for particulate matter with aerodynamic diameter between 10 m, and 2.5 m respectively (PM 10 and PM 2.5 ) to collect both indoor and outdoor samples. We have integrated various spectroscopic techniques to obtain complementary information about the composition of various size fractions of pollutants, their transformation and their possible sources. Our results show that the coarse fraction of PM is mainly due to natural sources such as dust storms crustal matter and seas salts, while the fine and ultrafine fractions of PM matter contains compounds created through reactions of the natural coarse pollutants with anthropogenic emissions such as sulfur dioxide (SO 2 ) and nitrogen oxides (NO x ), during transport in the atmosphere. The major phase of such new compounds was ammonium sulfate.

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Residential indoor airborne microbial populations in the United Arab Emirates

Cited by 42 publications

References 10 publications

Indoor Airborne Bacteria And Fungi Atdifferent Background Area In Nurseries And Day Care Centres Environments

Indoor Airborne Bacteria And Fungi Atdifferent Background Area In Nurseries And Day Care Centres Environments

Indoor Airborne Microflora in Various Section of a Tertiary Healthcare Centre in Rural Area of Ovia Northeast Edo State

Elemental and Chemical Analysis of PM10 and PM2.5 Indoor and Outdoor Pollutants in the UAE

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