The occurrence and allergising potential of airborne pollen in West Bengal, India.
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Environmental Botany Laboratory, Department of Botany, Visva-Bharati, Birbhum, West Bengal, India
Institute of Child Health, Calcutta, India
Corresponding author
Dola Boral
Department of Botany, Visva-Bharati University, Santiniketan-731235, West Bengal,India.
Ann Agric Environ Med. 2004;11(1):45-52
A continuous 2-year volumetric aerobiological survey was conducted in Berhampore town, a centrally located and representative part of West Bengal, India. The aim of the study was to assess the allergising potential of airborne pollen grains of West Bengal. A total of 31 pollen types were identified of which Poaceae (grasses) pollen showed maximum frequency, followed by Cyperaceae, Cassiasp., Acacia auriculiformis, etc. The seasonal periodicities of the pollen types and their relationship to meteorological conditions were investigated. It was found that the pollen concentration is positively correlated with temperature and negatively correlated with rainfall and relative humidity. Clinical investigations by skin prick test were carried out to detect allergenicity of pollen types. Eighteen common airborne pollen types induced positive responses of which pollen extracts of Saccharum officinarum (grass), Azadirachtaindica, Cocos nucifera, Phoenix sylvestris, Cyperus rotundus and Eucalyptus citriodora showed strongest sensitising potential. This result is consistent with previous investigations in different parts of West Bengal.
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