Contamination Status of Pet Cats in Thailand with Organohalogen Compounds (OHCs) and Their Hydroxylated and Methoxylated Derivatives and Estimation of Sources of Exposure to These Contaminants

Makoto Shimasaki; Hazuki Mizukawa; Kohki Takaguchi; Aksorn Saengtienchai; Araya Ngamchirttakul; Disdanai Pencharee; Kraisiri Khidkhan; Yoshinori Ikenaka; Shouta M M Nakayama; Mayumi Ishizuka; Kei Nomiyama

doi:10.3390/ani12243520

Contamination Status of Pet Cats in Thailand with Organohalogen Compounds (OHCs) and Their Hydroxylated and Methoxylated Derivatives and Estimation of Sources of Exposure to These Contaminants

Animals (Basel). 2022 Dec 13;12(24):3520. doi: 10.3390/ani12243520.

Authors

Makoto Shimasaki¹, Hazuki Mizukawa^{1

2}, Kohki Takaguchi³, Aksorn Saengtienchai⁴, Araya Ngamchirttakul⁵, Disdanai Pencharee⁶, Kraisiri Khidkhan^{4

7}, Yoshinori Ikenaka^{7

8

9}, Shouta M M Nakayama⁷, Mayumi Ishizuka⁷, Kei Nomiyama¹

Affiliations

¹ Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577, Japan.
² Department of Science and Technology for Biological Resources and Environment, Graduate School of Agriculture, Ehime University, Tarumi 3-5-7, Matsuyama 790-8566, Japan.
³ Center for Preventive Medical Sciences, Chiba University, 6-2-1 Kashiwanoha, Kashiwa 277-0882, Japan.
⁴ Department of Pharmacology, Faculty of Veterinary Medicine, Kasetsart University, 50 Ngam Wong Wan Rd, Lat Yao, Chatuchak, Bangkok 10900, Thailand.
⁵ Kasetsart University Veterinary Teaching Hospital Nong Pho, Faculty of Veterinary Medicine, Kasetsart University, No. 121, Moo. 8, Ban Luek Subdistrict, Photharam District, Bangkok 70120, Thailand.
⁶ Kasetsart University Veterinary Teaching Hospital Hua Hin, Faculty of Veterinary Medicine, Kasetsart University, Petchkasem Road, Nong Kae Subdistrict, Hua Hin District, Prachuap Khiri Khan 77110, Thailand.
⁷ Department of Environmental Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita-ku, Sapporo 060-0818, Japan.
⁸ Veterinary Teaching Hospital, Graduate School of Veterinary Medicine, Hokkaido University, N18 W9, Sapporo 060-0818, Japan.
⁹ One Health Research Center, Hokkaido University, Kita 18, Nishi 9, Kita-ku, Sapporo 060-0818, Japan.

Abstract

In this study, we analyzed serum samples of pet cats from Thailand and estimated the contribution to organohalogen compounds (OHCs) exposure through cat food and house dust intake. BDE-209 was predominant in cat sera and accounted for 76% of all polybrominated diphenyl ethers (PBDEs). Decabromodiphenyl ether (BDE-209) is a major contaminant in dry cat food and house dust, which has been estimated to be a source of exposure for Thai pet cats. BDE-209 is a major contaminant of OHCs in dry cat food and house dust, which was estimated to be a source of exposure for Thai pet cats. On the other hand, the level of contamination by PCBs was lower than in other countries. Analysis of pet foods suggested that BDE-209 in pet cat serum was attributable to the consumption of dry cat food. On the other hand, house dust also contained high concentrations of BDE-209. Thus, high levels of BDE-209 in pet cat sera can be attributed to the consumption of dry cat food and house dust. These results suggest that pet cats are routinely exposed to non-negligible levels of OHCs.

Keywords: cat food; house dust; organohalogen compounds (OHCs); pet cat; polybrominated diphenyl ethers (PBDEs); polychlorinated biphenyls (PCBs).

Abstract

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