Streptococcus suis Situation and Trend in Thailand, 2021-2026 (Data as of 20 April 2026)
DOI:
https://doi.org/10.59096/wesr.v57i4.7796Keywords:
Streptococcus suis, situationAbstract
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- Infection with Streptococcus suis (commonly known as “deafness fever”) is an important zoonotic disease. Transmission occurs through consumption of raw or undercooked pork or pig blood, or through direct contact with infected pigs or contaminated pork, with entry via skin wounds or mucous membranes.
- Over the past five years (2021–2025), cases and deaths have been continuously reported. In 2025, there were 960 cumulative cases and 50 deaths (case fatality rate: 5.21%), which decreased compared to 2024. In 2026 (data as of 20 April 2026), 218 cases and 12 deaths have been reported.
- Cases are predominantly concentrated in the northern and northeastern regions, with cluster outbreaks reported in some provinces, alongside sporadic cases nationwide. This reflects a risk of broader community transmission, particularly among populations with practices involving raw pork consumption or pig slaughtering.
- Strengthening surveillance, control, and prevention systems remains essential, requiring multisectoral collaboration to enhance public awareness and reduce high-risk behaviors.
References
Kerdsin A. Human Streptococcus suis Infections in Thailand: Epidemiology, Clinical Features, Genotypes, and Susceptibility. Trop. Med. Infect. Dis. 2022;7:359.
Department of Health, The Centre for Health Protection (HK). Streptococcus suis Infection [Internet]. 2024 [cited 2025 May 27]. Available from: https://www.chp.gov.hk/en/healthtopics/content/24/3648.html#
Ministry of Public Health (MOPH). Factsheet of Emerging Disease โรคติดเชื้อสเตร็พโตค็อกคัส ซูอิส [Internet]. 2011 [cited 2026 Apr 20]. Available from: https://www.pidst.or.th/userfiles/f11.pdf (in Thai)
Phuapradit P, Boongird P, Boonyakarnkul S, Niramarnsakul S, Ponglikitmongkol S, Vorachit M. Meningitis caused by Streptococcus suis in humans. Intern Med. 1987;3:120–2.
Fongcom A, Pruksakorn S, Mongkol R, Tharavichitkul P, Yoonim N. Streptococcus suis infection in northern Thailand. J Med Assoc Thai. 2001;84(10):1502–8.
Khadthasrima N, Hannwong T, Thammawitjaya P, Pingsusean D, Akkanij B, Jaikhar A, Paungmali P, Yudee P, Wongyai S, Samerchea S, et al. Human Streptococcus suis outbreak in Phayao Province, Thailand, 2007. OSIR J. 2008;1:4–7.
Naosang K, Panyakaew C, Srichai P, Yokart W, Hiranteerarom S, Petchkum P. Risk factors associated with mortality in patients with Streptococcus suis infections: a retrospective cohort study conducted at the Somdejphrajaotaksinmaharaj Hospital in Tak Province, Thailand. Bu J Med. 2025;12(1):43–62. (in Thai)
Le Plastrier K. Scary truth about ‘gross’ food craze of eating raw meat [Internet]. 2025 [cited 2026 Apr 21]. Available from: https://www.news.com.au/lifestyle/food/food-warnings/doctor-spills-the-truth-about-dangerous-tiktok-craze-of-eating-raw-meat/news-story/ea8ebbe990c069030553c58fce497163
Praphasiri P, Nakphook S, Prasert K. Social and cultural vulnerabilities that contribute to the occurrence of permanent hearing loss caused by Streptococcus suis. Journal of Health Science, Boromarajonani College of Nursing, Sunpasitthiprasong. 2023;7(3):1–10.
National Science and Technology Development Agency. โรคไข้หูดับ ภัยเงียบที่ควรจับตามอง [Internet]. 2021 [cited 2026 Apr 20]. Available from: https://www.nstda.or.th/home/news_post/sci-update-streptococcus-suis/
Rayanakorn A, Katip W, Ademi Z. Economic burden associated with Streptococcus suis infection treatment in Northern Thailand: a hospital-based observational study. Value in Health. 2022;25(Suppl 1): S477–8.
Neila-Ibáñez C, Casal J, Hennig-Pauka I, Stockhofe-Zurwieden N, Gottschalk M, Migura-García L, Pailler-García L, Napp S. Stochastic assessment of the economic impact of Streptococcus suis-associated disease in German, Dutch and Spanish swine farms. Front Vet Sci. 2021;8:676002.
Ministry of Public Health (TH), Department of Disease Control. Guidelines for prevention and control of Streptococcus suis. Nonthaburi: Department of Disease Control [Internet]. 2022 [cited 2026 Apr 16]. Available from: https://ddc.moph.go.th/uploads/publish/1238120220301035806.pdf
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