Objective: To isolate potential pathogenic fungi from smokeless tobacco products.
Methods: The study was conducted from January 2015 to February 2017 during which samples of smokeless tobacco products such as Mainpuri, Tambako, Khiwam, Gutkha, Naswar and Mawa etc. were collected from different cities of Pakistan. The samples were tested for fungal contamination by spread plate method. Different strains of fungi were isolated and identified on the basis of their macroscopic as well as microscopic characteristics. The fungal strains isolated were also screened for their susceptibility to commonly used antifungal drugs by disc diffusion method.
Results: Of the 600 samples collected, 300(50%) were from Sindh, 70(11.7%) Balochistan, 74(12.3%) from Khyber Pakhtunkhwa, 105(17.5%) from Punjab and 51(8.5%) from Azad Kashmir. In terms of products, there were 404(67.3%) samples of Naswar, 69(11.5%) Patti, 40(6.6%) Khiwam, 35(5.8%) Mawa, 32(5.3%) Gutkha, and 20(3.3%) Mainpuri samples. Different species of Aspergillus were predominantly isolated followed by Penicillium, Mucor, Sepedonium and Trichophyton. The isolated strains of Aspergillus also revealed resistance against many commonly-used anti-fungals such as Amphotericin B and Itraconazole..
Conclusions: There was high prevalence of opportunistic fungi in study samples, posing a threat for human health which requires prompt notice and management.
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