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Indoor and Built Environment
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Measuring Indoor Fungal Contaminants in Rural West Bengal, India, with Reference to Allergy Symptoms

Kashinath Bhattacharya

Department of Botany, Visva-Bharati University, Santiniketan, West Bengal, India

Subrato Raha

Department of Botany, Visva-Bharati University, Santiniketan, West Bengal, India

Manas Ranjan Majumdar

Department of Botany, Barasat Government College, Barasat, 24 Parganas, West Bengal, India

An airborne fungal spore survey in five indoor environ ments in Santiniketan, West Bengal, India was carried out for a period of 2 years using the Astir 1-day personal volumetric sampler as well as a Rotorod sampler and sedimentation plates. A total of 24 fungal spore genera in addition to Aspergilli were recorded of which three were Phycomycetes (Cunninghamella, Rhizopus, Syncepha lastrum), two were Ascomycetes (Chaetomium, Pleospo ra), one was Basidiomycete (Ganoderma ) and the re mainder were fungi imperfecti. Aspergillus contributed most to the total aerospora in the environment, followed by Curvularia and Cladosporium. The occurrence of aerospora exhibited a distinct seasonal periodicity in their annual distribution, perhaps due to differences in meteorological conditions. Concentrations were lowest in summer and highest during monsoon and postmon soon periods. High concentration of spores in winter was due to a large number of saprophytic forms, of which Cladosporium was the major component. The predomi nance of Aspergillus, Curvularia, Cladosporium, Alter naria in all the indoor environments contributed to their ability to grow in various substrata. Moreover, indoor aeroflora might have been diluted by the outside aeroflo ra entering through different inlets. The clinical investi gation clearly demonstrated the highly allergenic nature of the ten tested fungal antigens that may be due to a higher prevalence of such fungal forms in the surround ings of those tested.

Key Words: Indoor fungi • Allergy • Rural West Bengal • India

Indoor and Built Environment, Vol. 10, No. 1, 40-47 (2001)
DOI: 10.1177/1420326X0101000104
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