Emission of bacterial bioaerosols from a composting facility in Maharashtra, India

Pahari, Arnab Kumar; Dasgupta, Debdeep; Patil, Rashmi S.; Mukherji, Suparna

doi:10.1016/j.wasman.2016.04.027

Cited by 47 publications

(28 citation statements)

References 49 publications

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“…As MSW can be easily colonized by bacteria and fungi, these microorganisms might aerosolize upon handling, i.e., turn into bioaerosols, and workers may be exposed to numerous biological agents, which pose health hazards 29 , 33 , 34 . It is reported that people who work handling recyclable waste may present an elevated risk of irritation of the skin, eyes, and throat, and gastrointestinal, respiratory, and musculoskeletal problems compared to those of other jobs 28 , 32 , 35 .…”

Section: Introductionmentioning

confidence: 99%

“…Although it is already known that the exposure to several biological agents is high and that there is a great risk of occupational health problems for workers of this sector 29 , 36 , the assessment of bioaerosols, particle mass (PM), and particle number concentrations (PNC) suspended in the air of materials recycling facilities is scarce. Most studies have been focusing on the people who collect the waste 33 , 37 – 40 and on composting facilities and landfill sites 27 , 34 , 35 , 41 – 44 .…”

Section: Introductionmentioning

confidence: 99%

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Assessment of airborne particles and bioaerosols concentrations in a waste recycling environment in Brazil

Wikuats

Duarte

Prates

et al. 2020

Sci Rep

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This study aims to assess the concentrations of size-fractioned particle mass (PM1.0, PM2.5, PM4.0, PM10) and number (PNC0.3, PNC0.5, PNC1.0, PNC2.5), bacteria, and fungi in a Materials Recycling Facility (MRF) in Brazil. The measurements were performed inside the waste processing shed (P1) and in the outdoor environment (P2) during working days in winter and spring of 2017, and summer of 2019. A total of 2,400 min of PM, 1,440 min of PNC, and 216 samples of bioaerosols were collected in the morning and afternoon. P1 has the strongest air contamination with mean values of 475.5 ± 563.7 µg m−3 for PM10, 58.6 ± 36.0 cm−3 for PNC0.3, 1,088.8 ± 825.2 colony-forming units per cubic meter (CFU m−3) for bacteria, and 2,738.3 ± 1,381.3 CFU m−3 for fungi. The indoor/outdoor ratios indicated the large influence of indoor sources due to the activities performed inside P1 that promote the generation and resuspension of pollutants. Gram-positive bacteria dominated with 58.6% of indoor samples. Overall, our results show a critical indoor air quality situation in a Brazilian MRF, which may cause several health risks for waste pickers. Finally, we call attention to the lack of occupational exposure limits for bioaerosols in industrial workplaces and mainly in MRFs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessment of airborne particles and bioaerosols concentrations in a waste recycling environment in Brazil

Wikuats

Duarte

Prates

et al. 2020

Sci Rep

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“…Thus, particles larger than 7 mm in diameter are collected in the upper (1st) stage, 4.7-7.0 mm in the 2nd, 3.3-4.7 mm in the 3rd, 2.1-3.3 mm in the 4th, 1.1-2.1 mm in the 5th, and 0.6-1.1 mm in the bottom stage. This instrument is widely used to size-selectively enumerate culturable particles in the air (Bragoszewska et al 2016;Pahari et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Sampling efficiencies of two modified viable cascade impactors

Kesavan

Rule

2017

Aerosol Science and Technology

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Prevention of airborne contagious diseases depends on successful characterization of aerosols in the environment. The use of cascade impactors to characterize ambient aerosols is one of the most commonly used methods, providing data on both particle size and concentration. In this study, the use of a cascade impactor recently described in the literature using 8 mL of liquid in Petri dishes (CI-L) was compared with a new method that uses wet membrane filters on top of wax filled Petri dishes (CI-WWMF). Sampling efficiencies of the cascade impactors were evaluated using 0.5, 1, 3, and 5 mm polystyrene latex (PSL) microspheres and aerosol consisting of single spores of Bacillus atrophaeus var. globigii (BG). The sampling efficiency of the CI-L was 6%, 11%, 17%, 21%, and 58% for 0.5, 1, 3, 5 mm PSL microspheres and BG spores, respectively. Higher overall sampling efficiencies of 71%, 91%, 60%, 64%, and 104% were observed for the same size and type of particles for the CI-WWMF. This study indicates that using wet filters on top of wax-filled Petri dishes (CI-WWMF) in a viable cascade impactor is more efficient than the CI-L method for size-selectively collecting biological aerosols from the environment. The CI-WWMF method is useful when a liquid medium is required for identifying and quantifying organisms using polymerase chain reaction (PCR) and immuno-assay techniques.

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“…Overall, these results indicate that approximately 46% of the total viable bacteria collected in the six-stage impactor were in the size range of 0.6–2.1 μm that can penetrate and deposit in the secondary bronchi, terminal bronchi, and alveolus. Therefore, 53% of the bacterial bioaerosols were in the size range of coarse atmospheric particles (>2.1 μm): nasal cavity, pharynx trachea, and primary bronchi [43,44]. For NICU#2, airborne bacteria concentration (Figure 6c) predominated in the nasal cavity size range (26%), terminal bronchi (18%), and alveoli (18%).…”

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

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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.

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Emission of bacterial bioaerosols from a composting facility in Maharashtra, India

Cited by 47 publications

References 49 publications

Assessment of airborne particles and bioaerosols concentrations in a waste recycling environment in Brazil

Assessment of airborne particles and bioaerosols concentrations in a waste recycling environment in Brazil

Sampling efficiencies of two modified viable cascade impactors

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

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