scholarly journals Spatial variation and comprehensive health risk assessment of microbial indoor air quality in microenvironments of North Delhi

2021 ◽  
Author(s):  
Pradeep Kumar ◽  
A. B. Singh ◽  
Rajeev Singh
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Respiratory Health ◽  
Winter Season ◽  
Health Problems ◽  
Molecular Techniques ◽  
Bacterial Aerosol ◽  
Comprehensive Health ◽  
Bacterial Aerosols

Abstract The high airborne microbial concentration of indoor areas may be responsible for adverse indoor air quality linked with adverse respiratory and general health effects in the form of Sick building syndromes. The current study aimed to isolate and characterize seasonal (winter and spring) levels of culturable bio-aerosols from indoor air and their impact on human health by using an epidemiological health survey. After culturing, microorganisms were identified by standard macro and microbiological protocols followed by biochemical testing and molecular techniques. Sampling results show that bacterial aerosol concentration in the winter season varies from (300–3650 CFU/m) and fugal aerosols (300–4150 CFU/m3) in different microenvironments. However, in spring bacterial aerosols ranged (450–5150 CFU/m3) and fungi (350–5070 CFU/m3). Aspergillus and Cladosporium were major recorded fungi however, Staphylococcus, Streptobacillus, and Micrococcus were major bacterial genera among all the sites. Analysis of the questionnaire survey represented that headache (28%) and allergies (20%) were major indoor health problems followed by others. Major outcomes of the current study suggested that the elevated levels of bioaerosols are a major risk factor and causing various respiratory health problems. The observed dynamics of this study will help the inhabitants to take precautionary actions to avoid hazardous bioaerosols.

Impact of indoor air quality on respiratory health: results of a local survey on housing environment

Public Health ◽  
2018 ◽  
Vol 163 ◽  
pp. 76-79 ◽  
Author(s):  
B. Lévesque ◽  
V. Huppé ◽  
M. Dubé ◽  
R.C. Fachehoun
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Respiratory Health ◽  
Housing Environment

scholarly journals Efficiency and Eco-Costs of Air Purifiers in Terms of Improving Microbiological Indoor Air Quality in Dwellings—A Case Study

Atmosphere ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 742 ◽  
Author(s):  
Ewa Brągoszewska ◽  
Magdalena Bogacka ◽  
Krzysztof Pikoń
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Pollution Prevention ◽  
Average Concentration ◽  
Environmental Cost ◽  
Bacterial Aerosol ◽  
The Impact ◽  
Ecological Cost

Air pollution, a by-product of economic growth, generates an enormous environmental cost in Poland. The issue of healthy living spaces and indoor air quality (IAQ) is a global concern because people spend approximately 90% of their time indoors. An increasingly popular method to improve IAQ is to use air purifiers (APs). Indoor air is often polluted by bioaerosols (e.g., viruses, bacteria, fungi), which are a major concern for public health. This work presents research on culturable bacterial aerosol (CBA) samples collected from dwellings with or without active APs during the 2019 summer season. The CBA samples were collected using a six-stage Andersen cascade impactor (ACI). The CBA concentrations were expressed as Colony Forming Units (CFU) per cubic metre of air. The average concentration of CBA in dwellings when the AP was active was 450–570 CFU/m3, whereas the average concentration when the AP was not active was 920–1000 CFU/m3. IAQ, when the APs were active, was on average almost 50% better than in cases where there were no procedures to decrease the concentration of air pollutants. Moreover, the obtained results of the particle size distribution (PSD) of CBA indicate that the use of APs reduced the proportion of the respirable fraction (the particles < 3.3 µm) by about 16%. Life cycle assessment (LCA) was used to assess the ecological cost of air purification. Our conceptual approach addresses the impact of indoor air pollution on human health and estimates the ecological cost of APs and air pollution prevention policies.

Children respiratory health in relation to indoor air quality in schools

2013 ◽  
Vol 2013 (1) ◽  
pp. 4902
Author(s):  
Liliia Petruk ◽  
Olena Turos ◽  
Liudmyla Mykhina
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Respiratory Health

scholarly journals An overview of indoor air quality and its impact on respiratory health among Malaysian school-aged children

2014 ◽  
Vol 0 (0) ◽  
Author(s):  
Chua Poh Choo ◽  
Juliana Jalaludin
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Indoor Air Pollution ◽  
Prolonged Exposure ◽  
Respiratory Health ◽  
Epidemiologic Studies ◽  
School Aged Children ◽  
The Impact

AbstractThe indoor environment is a major source of human exposure to pollutants. Some pollutants can have concentrations that are several times higher indoors than outdoors. Prolonged exposure may lead to adverse biologic effects, even at low concentrations. Several studies done in Malaysia had underlined the role of indoor air pollution in affecting respiratory health, especially for school-aged children. A critical review was conducted on the quantitative literature linking indoor air pollution with respiratory illnesses among school-aged children. This paper reviews evidence of the association between indoor air quality (IAQ) and its implications on respiratory health among Malaysian school-aged children. This review summarizes six relevant studies conducted in Malaysia for the past 10 years. Previous epidemiologic studies relevant to indoor air pollutants and their implications on school-aged children’s respiratory health were obtained from electronic database and included as a reference in this review. The existing reviewed data emphasize the impact of IAQ parameters, namely, indoor temperature, ventilation rates, indoor concentration of carbon dioxide (CO

scholarly journals Housing Risk Factors Associated with Respiratory Disease: A Systematic Review

2021 ◽  
Vol 18 (6) ◽  
pp. 2815
Author(s):  
Nipuni Nilakshini Wimalasena ◽  
Alice Chang-Richards ◽  
Kevin I-Kai Wang ◽  
Kim N. Dirks
Keyword(s):  
Risk Factors ◽  
Systematic Review ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Respiratory Disease ◽  
Indoor Air ◽  
Respiratory Health ◽  
Outdoor Environment ◽  
Related Factors ◽  
Factors Associated

Cold, damp and mouldy housing arises from the degradation of the housing stock over time due to weathering and a lack of maintenance. Living in such houses is associated with many adverse impacts on human health, especially for those with existing health issues. This paper presents a systematic review, using the PRISMA protocol, consisting of an exploratory analysis of housing-related risk factors associated with respiratory disease. The review consisted of 360 studies investigating 19 risk factors associated with respiratory conditions. Each fall into one of four categories, namely, (1) outdoor environment-related factors; (2) indoor air pollution-related factors; (3) housing non-structure-related factors; or (4) housing structure-related factors. The results show that effects of poor housing conditions on occupants’ respiratory health is a growing research field, where poor indoor air quality, mainly due to a lack of adequate ventilation, was found to be the most influential risk factor. Usage of solid fuel and living in an urban area without a pollutant-free air filtration system are the main risk factors related to inadequate ventilation. Therefore, an adequate and reliable ventilation system with air-infiltration was considered to be the main mitigation solution to improve indoor air quality. It is suggested that government organisations and health practitioners could use the identified risk factors to measure the healthiness of existing dwellings and take measures to improve existing conditions and develop regulations for new housing construction to promote the healthy home concept. Further research is needed for risk mitigation strategies to reduce the respiratory health burden attributed to housing.

scholarly journals Indoor air quality, ventilation and respiratory health in elderly residents living in nursing homes in Europe

2015 ◽  
Vol 45 (5) ◽  
pp. 1228-1238 ◽  
Author(s):  
Malek Bentayeb ◽  
Dan Norback ◽  
Micha Bednarek ◽  
Alfred Bernard ◽  
Guihong Cai ◽  
...  
Keyword(s):  
Air Quality ◽  
Nursing Homes ◽  
Nitrogen Dioxide ◽  
Indoor Air Quality ◽  
Elderly People ◽  
Indoor Air ◽  
Respiratory Health ◽  
Elderly Subjects ◽  
The Past ◽  
Comfort Parameters

Few data exist on respiratory effects of indoor air quality and comfort parameters in the elderly. In the context of the GERIE study, we investigated for the first time the relationships of these factors to respiratory morbidity among elderly people permanently living in nursing homes in seven European countries.600 elderly people from 50 nursing homes underwent a medical examination and completed a standardised questionnaire. Air quality and comfort parameters were objectively assessed in situ in the nursing home. Mean concentrations of air pollutants did not exceed the existing standards.Forced expiratory volume in 1 s/forced vital capacity ratio was highly significantly related to elevated levels of particles with a 50% cut-off aerodynamic diameter of <0.1 µm (PM0.1) (adjusted OR 8.16, 95% CI 2.24–29.3) and nitrogen dioxide (aOR 3.74, 95% CI 1.06–13.1). Excess risks for usual breathlessness and cough were found with elevated PM10 (aOR 1.53 (95% CI 1.15–2.07) and aOR 1.73 (95% CI 1.17–10.3), respectively) and nitrogen dioxide (aOR 1.58 (95% CI 1.15–2.20) and aOR 1.56 (95% CI 1.03–2.41), respectively). Excess risks for wheeze in the past year were found with PM0.1 (aOR 2.82, 95% CI 1.15–7.02) and for chronic obstructive pulmonary disease and exhaled carbon monoxide with formaldehyde (aOR 3.49 (95% CI 1.17–10.3) and aOR 1.25 (95% CI 1.02–1.55), respectively). Breathlessness and cough were associated with higher carbon dioxide. Relative humidity was inversely related to wheeze in the past year and usual cough. Elderly subjects aged ≥80 years were at higher risk. Pollutant effects were more pronounced in the case of poor ventilation.Even at low levels, indoor air quality affected respiratory health in elderly people permanently living in nursing homes, with frailty increasing with age. The effects were modulated by ventilation.

scholarly journals Preschools’ Indoor Air Quality and Respiratory Health Symptoms among Preschoolers in Selangor

2015 ◽  
Vol 30 ◽  
pp. 303-308 ◽  
Author(s):  
Chua Poh Choo ◽  
Juliana Jalaludin ◽  
Titi Rahmawati Hamedon ◽  
Nor Mariah Adam
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Respiratory Health ◽  
Health Symptoms
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