Identification of Pathogenic and Opportunistic Yeasts in Pigeon Excreta by MALDI-TOF Mass Spectrometry and Their Prevalence in Chon Buri Province, Thailand

Rungnapa Nualmalang, Natthapaninee Thanomsridetchai, Yothin Teethaisong, Passanesh Sukphopetch and Marut Tangwattanachuleeporn ()
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Rungnapa Nualmalang: Department of Medical Sciences, Faculty of Allied Health Sciences, Burapha University, Mueang, Chonburi 20131, Thailand
Natthapaninee Thanomsridetchai: Department of Medical Technology, Faculty of Allied Health Sciences, Burapha University, Mueang, Chonburi 20131, Thailand
Yothin Teethaisong: Department of Medical Sciences, Faculty of Allied Health Sciences, Burapha University, Mueang, Chonburi 20131, Thailand
Passanesh Sukphopetch: Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
Marut Tangwattanachuleeporn: Department of Medical Sciences, Faculty of Allied Health Sciences, Burapha University, Mueang, Chonburi 20131, Thailand

IJERPH, 2023, vol. 20, issue 4, 1-11

Abstract: Pigeon excreta can cause environmental and public health issues, particularly in urban and public areas. They are reservoirs of several human pathogens including fungi, bacteria, and viruses. Epidemiological data of pathogenic and opportunistic yeasts in pigeon droppings in Chon Buri, one of the most reputable tourist cities of Thailand, are scarce. The present study aimed to identify yeasts in pigeon droppings by MALDI-TOF mass spectrometry, and to study their prevalence in Chon Buri, Thailand. A total of 200 pigeon fecal samples were collected randomly from all 11 districts of Chon Buri. A sum of 393 yeast-like colonies were isolated on Sabourand’s dextrose agar and CHROMagar media. These isolates were further confirmed for their species by MALDI-TOF MS. Twenty-four yeast species belonging to 11 different genera were identified in pigeon fecal samples. Candida spp., predominantly C. krusei (14.32%), were the most prevalent yeast species. Other yeast species, including C. glabrata (12.73%), C. metapsilosis (11.93%), Lodderomyces elongisporus (10.87%), C. tropicalis (7.16%) , C. albicans (5.83%), and Cryptococcus neoformans (4.77%) were identified. This study provides valuable epidemiological data and diversity of yeasts in pigeon droppings in Chon Buri, Thailand, and also supports the use of MALDI-TOF MS for yeast identification and epidemiological surveillance.

Keywords: MALDI-TOF MS; pigeon dropping; yeasts; prevalence; Thailand (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2023
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