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Chiradeep Basu

Bio: Chiradeep Basu is an academic researcher from Jadavpur University. The author has contributed to research in topics: Outbreak & Tropical climate. The author has an hindex of 1, co-authored 2 publications receiving 2 citations.

Papers
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Journal ArticleDOI
TL;DR: Five sampling locations in Kolkata frequented by a heterogeneous human population, containing various types of fungal growth-promoting substances, were chosen as sampling locations where an Andersen Two-Stage Cascade Impactor was ran using Rose Bengal agar and Potato Dextrose agar media plates.
Abstract: This paper aims to quantify airborne fungal load in air-conditioned rooms and develop a health risk rating scale for different indoor environments. Five sampling locations in Kolkata frequented by a heterogeneous human population, containing various types of fungal growth-promoting substances (FGPS) like old documents, food items, waste hair, etc. were chosen as sampling locations where an Andersen Two-Stage Cascade Impactor was ran using Rose Bengal agar and Potato Dextrose agar media plates. Total spore load (CFU/m3), species diversity, species dominance, human exposure time, susceptible age and FGPS were considered the risk factors for this study. A risk rating scale was developed after evaluating the relative importance of these different factors in relation to human health. The most dominant genera were Aspergillus, followed by Penicillium. Maximum CFU was observed at library, followed by computer room.

4 citations

Journal ArticleDOI
08 Jun 2021
TL;DR: Damaging factors such as airborne microorganisms, relative humidity, ventilation, temperature and air pollutants are the major concerns of the tropical climate of Kolkata, India where our study sit as mentioned in this paper.
Abstract: Damaging factors such as airborne microorganisms, relative humidity, ventilation, temperature and air pollutants are the major concerns of the tropical climate of Kolkata, India where our study sit...
Journal ArticleDOI
TL;DR: In this paper , a standard for permissible levels of microbial load in indoor environments has been suggested and the establishment of a standard of acceptable microbial load for mucormycosis patients has been discussed.
Abstract: Mucormycosis is a rising cause of invasive fungal infection but difficulty in diagnosis is the biggest detriment to early diagnosis. Rhinocerebral zygomycosis is most prevalent leading to vascular invasion, tissue necrosis, or even death. Rhizopus arrhizus is the most common causative agent of the disease, found on decaying organic matter but disease from Cunninghamella and Rhizomucor species should not be overlooked. The recent outbreak of COVID-19 pandemic has given rise to increasing patients of diabetes mellitus whose post-COVID immunocompromised state coupled with steroid use has led to rising numbers of mucormycosis patients in India. The establishment of a standard for permissible levels of microbial load in indoor environments has been suggested.

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Book ChapterDOI
01 Jan 2021
TL;DR: A comprehensive overview of current information regarding the characterization of indoor air pollutants, its concentration levels, health risk assessment, mitigation strategies, and sustainable remediation intended to reduce the impact of indoor Air Pollution on human health is provided in this article.
Abstract: In the modern world, humans spend more than 80 percent of their routine lives in indoors rather than outdoors. In recent decades, the improved living standards in indoor environments like houses, commercial offices, and similar places with decorations, refurbishment activities, remodeling, and new furniture emits toxic gases. Indoor Air Pollutants (IAP) comprises carbon monoxide and dioxide, nitrogen oxides, particulate matters, volatile organic compounds (formaldehyde, benzene, ethylene, etc.), and polycyclic aromatic hydrocarbons (biphenyl, benzo[a]pyrene, benzo[ghi]perylene, benzo[c]fluorine, etc.). Inhalation of these pollutants are likely to cause mortalities and morbidities illness attributed to respiratory diseases, cardiovascular diseases, pulmonary, and lung cancer diseases in human. According to World Health Organization, around 3.8 million populations die in a year prematurely from illness attributable to indoor pollution, i.e., pneumonia (27%), ischemic heart disease (27%), chronic obstructive pulmonary disease (20%), stroke (18%) and lung cancer (8%). Under these circumstances, mitigation measures are essential to seal off pollutants from the indoor environment for the protection of occupants from exposure accounting for advanced airflow distribution, photocatalytic oxidation techniques, and green system within indoor includes phytoremediation and biofiltration techniques. Hence, this chapter aimed to provide a comprehensive overview of current information regarding the characterization of indoor air pollutants, its concentration levels, health risk assessment, mitigation strategies, and sustainable remediation intended to reduce the impact of indoor air pollution on human health.

2 citations

Journal ArticleDOI
TL;DR: In this paper , the association between indoor air quality, surface contamination, and IAQ under heterogeneous cleaning procedures is investigated, and the results of active microbial sampling and settling plates are interpreted independently to avoid confusion.
Abstract: Studies on indoor air quality (IAQ) have linked exposure to microorganisms in indoor air to a variety of illnesses. The association between indoor air quality, surface contamination, and IAQ under heterogeneous cleaning procedures are all crucial factors that were investigated in this study. The ATP bioluminescence test demonstrated a significant correlation (r = 0.89; p 0.05) with bacterial count obtained from swab specimens and a moderate correlation (r = 0.57; p 0.001) with viable settling bacterial count. For the entire sample (pre- and post-cleaning), the ATP values were heterogeneous, averaging 230 RLU/100 cm2, 140 RLU/100 cm2, 120 RLU/100 cm2, 135 RLU/100 cm2, 99 RLU/100 cm2, and 80 RLU/100 cm2, in offices, classrooms, toilet doorknobs, reception desks, main lobbies, and exit doorknobs, respectively. An insignificant association between indoor and outdoor PM2.5 (r = 0.21; p 0.05), an I/O ratio of PM2.5 with an average value of 1.2, and an I/O ratio of CO2 exceeding 1 suggest a minor impact of outdoor air. After cleaning, the bacterial and fungal counts on indoor surfaces showed significant reduction, suggesting that the cleaning procedures were effective. The concentrations of VOC but not HCHO in indoor air were significantly affected by cleaning, but not by temperature or relative humidity (RH). We propose ATP bioluminescence as a surrogate for detecting bacterial contamination rather than fungal contamination, which requires additional validation. We suggest that the results of active microbial sampling (in CFU/m3) and settling plates (in CFU/m2/h) be interpreted independently to avoid confusion.

1 citations

Journal ArticleDOI
08 Jun 2021
TL;DR: Damaging factors such as airborne microorganisms, relative humidity, ventilation, temperature and air pollutants are the major concerns of the tropical climate of Kolkata, India where our study sit as mentioned in this paper.
Abstract: Damaging factors such as airborne microorganisms, relative humidity, ventilation, temperature and air pollutants are the major concerns of the tropical climate of Kolkata, India where our study sit...