Air microbial quality in certain public buildings, Egypt: A comparative study

Awad, Abdel Hameed A.; Saeed, Yuosra; Hassan, Y. Aboul-Enein; Fawzy, Yousef; Osman, Mohamed

doi:10.1016/j.apr.2017.12.014

Cited by 32 publications

(21 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…While, for NICU#2, bacterial concentrations ranged between 151.94–466.43 CFU/m 3 , with a mean concentration of 310.37 CFU/m 3 . Although detailed studies of bacterial bioaerosols in ICU settings are scarce in the literature, results of our research are similar to other studies done in public buildings and ICU [10,23,26,27,28]. The different concentrations in total viable bacteria in air between the two NICU studied, demonstrates the possible influence of personnel.…”

Section: Resultssupporting

confidence: 88%

See 1 more Smart Citation

Antibiotic Resistance of Airborne Viable Bacteria and Size Distribution in Neonatal Intensive Care Units

Gamero

Hernandez

Ramirez³

et al. 2019

IJERPH

View full text Add to dashboard Cite

Despite their significant impact on public health, antibiotic resistance and size distributions of airborne viable bacteria in indoor environments in neonatal intensive care units (NICU) remain understudied. Therefore, the objective of this study was to assess the antibiotic resistance of airborne viable bacteria for different sizes (0.65–7 µm) in private-style and public-style neonatal intensive care units (NICU). Airborne bacteria concentrations were assessed by a six-stage Andersen impactor, operating at 28.3 L/min. Public-style NICU revealed higher concentrations of airborne viable bacteria (53.00 to 214.37 CFU/m3) than private-style NICU (151.94–466.43), indicating a possible threat to health. In the public-style NICU, Staphylococcus was the highest bacterial genera identified in the present study, were Staphylococcus saprophyticus and Staphylococcus epidermidis predominated, especially in the second bronchi and alveoli size ranges. Alloiococcus otitidis, Bacillus subtiles, Bacillus thuringiensis, Kocuria rosea, and Pseudomonas pseudoalcaligene, were identified in the alveoli size range. In NICU#2, eight species were identified in the alveoli size range: Bacillus cereus, Bacillus subtilis, Bacillus thuringiensis, Eikenella corrodens, Pseudomonas aeruginosa, Staphylococcus aureus, Staphylococcus epidermidis, and Streptococcus gordoni. Multi-drug-resistant organisms (MDROs) were found in both of the NICUs. Bacillus cereus strains were resistant to Ampicillin, Cefoxitin, Ceftaroline, and Penicillin G. Staphylococcus cohnii ssp. cohnii was resistant in parallel to ampicillin and G penicillin. Staphylococcus saprophyticus strains were resistant to Ampicillin, Penicillin G, Oxaxilin, and Erythromycin. Results may indicate a potential threat to human health due to the airborne bacteria concentration and their antibiotic resistance ability. The results may provide evidence for the need of interventions to reduce indoor airborne particle concentrations and their transfer to premature infants with underdeveloped immune systems, even though protocols for visitors and cleaning are well-established.

show abstract

Section: Resultssupporting

confidence: 88%

“…On the other hand, bacterial bioaerosol concentration in the fine fractions is due to their greater surface area that allows greater adhesion. This situation, coupled with the fact that indoor environments present a higher concentration of fine particles that may remain suspended, may contribute to this finding [27,44,49,50].…”

Section: Resultsmentioning

confidence: 99%

Antibiotic Resistance of Airborne Viable Bacteria and Size Distribution in Neonatal Intensive Care Units

Gamero

Hernandez

Ramirez³

et al. 2019

IJERPH

View full text Add to dashboard Cite

show abstract

“…Outdoor air has become one of the main factors contributing to the complex system of indoor biological contaminants within a building. 25,29,30 Air exchange in the built environment is the replacement of fresh outdoor air with indoor air. A high air exchange rate from the outdoor environment with comfortable climate conditions can improve indoor air quality by reducing indoor air contaminants.…”

Section: Factors Of Indoor Biological Contaminants In Buildings Dispersal Of Airborne Bacteria and Fungi By Outdoor Airmentioning

confidence: 99%

“…[15][16][17] Numerous studies on airborne bacteria and fungi in the built environment conducted in different countries, including Korea, China, Ethiopia, Iran, Italy, Portugal, Jordan, France, Egypt, Malaysia, Pakistan, Greece and Finland with varying indoor locations. 15,[17][18][19][20][21][22][23][24][25][26][27][28] Table 1 provides the details (i.e. country, location, finding, and genera) of the studies on indoor airborne conducted worldwide.…”

Section: Introductionmentioning

confidence: 99%

Review Article: Indoor Biological Contaminants in the Built Environment

Rasli

Ramli

Ismail

2021

Curr Res Nutr Food Sci

View full text Add to dashboard Cite

Occupants of buildings spent most of their time indoors and posed themselves to the indoor biological contaminants (i.e. bacteria and fungi) in the built environment. However, the factors that influenced the prevalence of suspended bacteria and fungi in the air of the built environment are not well recognised. Authorities must take the growth of biological contaminants seriously to prevent serious health effects among occupants of buildings. This review summarises the factors (i.e. outdoor air, dust, ventilation problems, humidity/moisture surface problems and human occupancy) of indoor biological contaminants and their species in buildings that could worsen the indoor air quality. Bacteria species could exist in various indoor buildings (i.e. schools, cafeterias, mosques, faculties, child day-care centres, hospitals, dwellings, educational buildings, homes, elderly care centres, libraries, restaurants, and factories). The dominant bacteria were Bacillus spp. (24.1 %), Staphylococcus spp. (20.7 %), and Micrococcus spp. (20.7 %) whereas for fungi species were Penicillium spp. (25 %), Cladosporium spp. (21.9 %), and Aspergillus spp. (21.9 %).

show abstract

“…The intensity of impact on the microbiome depends on the building's occupation levels, the movement of air and on the occupants themselves (Adams et al 2016). The biological contaminants come mainly from outdoor air, anthropogenic sources and construction materials (Awad et. al.…”

Section: IVmentioning

confidence: 99%