Influence of seasonal variation on concentration of fungal bioaerosol at a sewage treatment plant (STP) in Delhi

Maharia, Sunita; Srivastava, Arun

doi:10.1007/s10453-014-9361-3

Cited by 16 publications

(10 citation statements)

References 25 publications

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“…As seen in Table 3 in the case of fungi, a very good correlation exists between each stage except stage 6 which has no correlation with any of the stages at all. Almost similar results have been found for size segregated fungal bioaerosol in Delhi region by Maharia and Srivastava, 2015. As seen in Table 3 in the case of GPB, a very good correlation exists between all the stages. Unlike GPB, in the case of GNB stage 1 and 2 has no correlation with stage 5 and 6.…”

Section: Correlation Analysissupporting

confidence: 82%

“…5 and These findings are totally in contrast to the study carried out by Agarwal et al (2016) wherein maximum and minimum fungal concentration has been reported in winter and pre monsoon season. However, higher concentration in post monsoon and lower in monsoon and winter has been reported in other few studies carried out in Delhi itself (Lal et al, 2013;Maharia and Srivastava, 2015). Fig.…”

Section: Seasonal Variation Of Bioaerosol Concentration With Sitementioning

confidence: 62%

“…It can be inferred from Fig. 2 that, there is an increasing trend in concentration from stages 1-4 with a further decreasing order from 4-6 which was found to be synonymous to the fungal bioaerosol study carried out at a university campus and sewage treatment plant in Delhi by Srivastava et al (2012) and Maharia and Srivastava (2015) respectively. In all three figures the highest concentration of fungus is found in stage 4 (size range 2.1 to 3.3 µm) and lowest concentration in stage 6 (size range 0.6 to 1.1 µm) except in winter season which has a higher concentration in stage 3.…”

Section: Size-segregated Distribution Of Bioaerosolsmentioning

confidence: 84%

“…Apart from indoor sources, various outdoor habitats such as sewage treatment plant, municipal waste dumping site etc., also emit various airborne microbes into the atmosphere depending upon the type and location of the facility (Maharia and Srivastava, 2015). The other factors on which the concentration of microorganisms and their range depend are weather condition and time of the year.…”

Section: Introductionmentioning

confidence: 99%

“…Similarly in case of GPB and GNB excellent regression of fine over coarse was observed (R 2 = 0.7912 and 0.8920 respectively). Maharia and Srivastava (2015) carried out similar regression analysis among fine and coarse fungal bioaerosol which is relevant to this study.…”

Section: Regression Analysismentioning

confidence: 99%

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Identification and Characterization of Size-Segregated Bioaerosols at Different Sites in Delhi

Lal

Ghosh

Srivastava

et al. 2017

Aerosol Air Qual. Res.

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Ambient levels of culturable bioaerosol were measured at four different sites of Delhi, India in six size ranges (> 7.0 µm, 7.0-4.7 µm, 4.7-3.3 µm, 3.3-2.1 µm, 2.1-1.1 µm, < 1.1 µm). The study also accounted the seasonal variation (monsoon, post monsoon, winter and pre-monsoon) of the air microbes. The sampling was carried out for three different fractions of bioaerosols viz. fungi, gram positive and negative bacteria during August 2010 to April 2011 using a six-stage viable cascade impactor sampler. Unlike gram positive and negative bacteria, the concentration of fungal bioaerosol found in different stages at each site seems to follow a typical pattern in all four season. The typical pattern of concentration depicts that majority of the fungal species found in the diameter range of 3.3-2.1 µm, which coincides with the penetration range in the secondary bronchi of the lungs in the human body. This reveals that majority of the immunotoxic and allergic fungi found at this stage are mostly prone to affect the secondary bronchi in human lungs when inhaled. At all four sites maximum fungal concentration (1740.5-3224.7 CFU m -3 ), gram-positive bacterial concentration (2790.6-9428.3 CFU m -3 ) and gram-negative bacterial concentration (1990.3-7609 CFU m -3 ) were found in post monsoon season. In the majority of the sites, minimum concentrations were found in monsoon period which probably may be due to rain wash during the sampling. For all the three bioaerosol fractions no particular relationship pattern was found to exist between their respective concentrations with temperature and relative humidity (RH). However, higher range of variation was observed at higher concentration levels and lower range of variation at low concentration levels for all the three bioaerosol fractions. Most of the fungal bioaerosol identified such as Penicillium sp., Alternaria sp. and Aspergillus sp. are associated with immunotoxic and allergic diseases.

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Section: Correlation Analysissupporting

confidence: 82%

Section: Seasonal Variation Of Bioaerosol Concentration With Sitementioning

confidence: 62%