Assessment of Fungal Concentrations Associated with Relative Humidity and Temperature Variations in the Indoor Environment

Background: Indoor environmental factors and human activities influence the presence and concentration of fungal propagules which may lead to the risk of developing respiratory infections and allergic reactions.

Aim/Objectives: This study aimed to identify the factors that influence indoor fungal composition and determine its association with the development of respiratory and allergic reactions.

Methodology: A total of 549 air samples and 226 nasal swabs of occupants were examined using health base questionnaire, malt extract agar and A6 single stage microbial air sampler. House dampness, mould growth on indoor materials, temperature, relative humidity, type of ventilation, type of human activity, and location of building were found to affect the prevalence and diversity of indoor fungi.

Results: A total of 55, 46 and 50 species of fungi were isolated from homes, offices and hospitals respectively. High fungal count, were recorded in homes with moisture problems, low temperature and high relative humidity and homes located in high density areas. High cases of respiratory health problems were reported by occupants of these homes.

Conclusion: Improvement in housing and establishment of awareness programmes can be used to lower fungal load and health problems associated with dampness in homes.It is necessary to maintain and prevent the housekeeping activities that can predispose fungal concentration in indoor environment.