Exposure to culturable airborne bioaerosols during noodle manufacturing in central Taiwan

Tsai, Min-Yi; Liu, Huiming

doi:10.1016/j.scitotenv.2008.10.029

Cited by 49 publications

(24 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other meteorological factors such as wind speed seem to be less important in relation to the concentrations of bacteria in the ambient air. This observation is in agreement with the literatures that RH and temperature are major factors affecting the release and dispersal of bioaerosols (Jones and Harrison 2004;Tsai and Liu 2009). In Beijing, spring occurs from March to May and summer from June to August.…”

Section: Seasonal Variationssupporting

confidence: 93%

Assessing genetic structure, diversity of bacterial aerosol from aeration system in an oxidation ditch wastewater treatment plant by culture methods and bio-molecular tools

Han

Liu

2012

Environ Monit Assess

View full text Add to dashboard Cite

Airborne bacteria emissions from oxidation ditch with rotating aeration brushes were investigated in a municipal wastewater treatment plant in Beijing, China. Microbial samples were collected at different distances from the rotating brushes, different heights above the water surface, and different operation state over a 3-month period (April, May, and June) in order to estimate the seasonal variation and site-related distribution characteristics of the microorganisms present. The concentration of bacterial aerosol was analyzed by culture methods, while their dominant species, genetic structure and diversity were assayed using bio-molecular tools. Results showed that total microbial concentrations were highest in June and lowest in April. The mechanical rotation caused remarkable variation in concentration and diversity of culturable airborne bacteria before and after the rotating brushes. The highest concentration was observed near the rotating brushes (931±129-3,952±730 CFU/m 3 ), with concentration decreasing as distance and height increased. Bacterial community polymerase chain reaction and denaturing gradient gel electrophoresis indicated that diversity decreased gradually with increasing height above the water surface but remained relatively constant at the same height. All dominant bacteria identified by DNA sequence analysis belonged to Firmicutes. Pathogenic species such as Moraxella nonliquefaciens and Flavobacterium odoratum were isolated from the bioaerosols. Due to the serious health risks involved, exposure of sewage workers to airborne microorganisms caused by brush aerators should be monitored and controlled.

show abstract

Section: Seasonal Variationssupporting

confidence: 93%

Assessing genetic structure, diversity of bacterial aerosol from aeration system in an oxidation ditch wastewater treatment plant by culture methods and bio-molecular tools

Han

Liu

2012

Environ Monit Assess

View full text Add to dashboard Cite

show abstract

“…Owing to their ability to produce mycotoxins, certain species of mold, such as Aspergillus and Penicillium, could contribute to air pollution and present a serious health hazard to WWTS workers when these mycotoxins accumulate in the air (De Luca et al 2001;Li et al 2011). Especially in highly humid environments, fungal spores can be released into the air, which could cause infections or allergic reactions in humans (Jones and Harrison 2004;Tsai and Liu 2009). Investigations on the toxicological mechanism of fungal aerosols are necessary.…”

Section: Diversity and Richness Estimation Of Clone Librariesmentioning

confidence: 99%

Site-related and seasonal variation of bioaerosol emission in an indoor wastewater treatment station: level, characteristics of particle size, and microbial structure

Ding

Han

et al. 2015

Aerobiologia

View full text Add to dashboard Cite

The emission of the airborne bacteria and fungi from an indoor wastewater treatment station adopting an integrated oxidation ditch with a vertical circle was investigated. Microbial samples were collected by the six-stage viable Andersen cascade impactor, and the samples were collected in triplicate in each sampling site per season. Culture-based method was applied to determine the concentrations of the airborne bacteria and fungi, while the cloning/ sequencing method was used to characterize the genetic structure and community diversity of airborne bacteria. The highest concentrations of airborne bacteria (4155 ± 550 CFU/m 3 ) and fungi (883 ± 150 CFU/m 3 ) were obtained in June (summer). The lowest concentration of bacteria (1458 ± 434 CFU/m 3 ) was determined in January (winter), and the lowest concentration of fungi (169 ± 40 CFU/m 3 ) was found in March (spring), respectively. The particle size distribution analysis showed that most culturable bacteria obtained in all the sampling sites were in the particle size range of 1.1-4.7 lm. Most culturable fungi had particle sizes in the range 1.1-3.3 lm. Microbial population analysis showed that Bacillus sp., Acinetobacter sp., and Lysinibacillus were the main groups obtained in S1.Enterobacter was the dominant group in sampling site S2. Both the concentrations and particle size distribution of the bioaerosols in the enclosed space presented a seasonal and site-related variation. Concentration and richness of microorganisms in bioaerosols in June were higher than in September and January. The particle size distribution varied between the sampling sites, and proportion of large particles was higher in S2 than in S1 because of the settlement of large particles. Pathogenic species, such as Acinetobacter lwoffii, Staphylococcus saprophyticus, and Enterobacter sp., were isolated from the bioaerosols, which could pose serious latent danger to sewage workers' health.

show abstract

“…Passive: petri plate Penicillium Noodle manufacturing [15] Food warehouse (rice grains) [14] Wheat flour mill [17] Rice mill [18] Cake factory [19] Active: impaction (MAS-100)…”

Section: Mucormentioning

confidence: 99%

Bioaerosols in the Food and Beverage Industry

Theisinger¹,

Smidt²

2017

Ideas and Applications Toward Sample Preparation for Food and Beverage Analysis

View full text Add to dashboard Cite

Bioaerosol monitoring is a rapidly emerging area of industrial hygiene. Microbial roles in atmospheric processes are thought to be species specific and potentially depend on cell viability. Accumulating evidence suggests that exposure to bioaerosols may cause adverse health effects, including disease. Studies of bioaerosols have primarily focused on chemical composition and biological composition, and the negative effects thereof on ecosystems and human health have largely gone unnoticed. This gap can be attributed to international standards on acceptable maximum bioaerosol loads not being uniform and the lack of uniform standardized methods for collection and analysis of bacterial and fungal bioaerosols. In this chapter, bioaerosol composition, relevance of bioaerosols to the food processing facility, sampling and detection approaches, and complications were discussed.

show abstract

Exposure to culturable airborne bioaerosols during noodle manufacturing in central Taiwan

Cited by 49 publications

References 25 publications

Assessing genetic structure, diversity of bacterial aerosol from aeration system in an oxidation ditch wastewater treatment plant by culture methods and bio-molecular tools

Assessing genetic structure, diversity of bacterial aerosol from aeration system in an oxidation ditch wastewater treatment plant by culture methods and bio-molecular tools

Site-related and seasonal variation of bioaerosol emission in an indoor wastewater treatment station: level, characteristics of particle size, and microbial structure

Bioaerosols in the Food and Beverage Industry

Contact Info

Product

Resources

About