Tick-Borne Bacterial Pathogens: 25-Year Thailand Review

Tick-borne bacterial pathogens represent a significant public health threat across Southeast Asia. Consequently, a comprehensive 25-year scoping review from Thailand has highlighted critical gaps in surveillance and methodology. This research analyzed data from 2001 to 2025, revealing eighteen bacterial genera in various tick species. Notably, researchers identified Rickettsia, Anaplasma, and Ehrlichia as the primary tick-borne bacterial pathogens. Understanding these patterns is vital for clinicians managing zoonotic infections in the region.

Bacterial Diversity and Surveillance Gaps

Interestingly, Rhipicephalus ticks showed the highest bacterial diversity in the synthesized data. However, most surveillance efforts relied heavily on conventional PCR, which limits the detection of emerging or rare strains. Furthermore, geographic gaps in the Korat Plateau and Continental Indo-Chinese Mainland may lead to an underestimation of regional disease risks. This suggests that current surveillance might not capture the full spectrum of pathogenic organisms affecting human and animal populations.

Monitoring Tick-Borne Bacterial Pathogens via One Health

Therefore, standardized genomic surveillance is essential for improving zoonotic disease preparedness. Experts advocate for incorporating metagenomic sequencing into national monitoring strategies. This approach allows for a broader detection of both pathogens and endosymbionts. Additionally, it strengthens the One Health framework by bridging human, animal, and environmental health data. Moreover, proactive monitoring ensures that practitioners are better equipped to handle non-specific febrile illnesses linked to tick exposure.

FAQs

What are the most common tick-borne pathogens in Thailand?

Research identifies Rickettsia species as the most frequently detected pathogens, alongside the Anaplasma and Ehrlichia genera.

Why is genomic surveillance necessary for tick-borne diseases?

Genomic surveillance provides a more accurate picture of bacterial diversity than conventional PCR. It helps identify surveillance gaps that might otherwise underestimate the prevalence of pathogenic organisms in under-represented regions.

Disclaimer: This content is for informational and educational purposes only. It does not constitute medical advice or establish a doctor-patient relationship. Healthcare professionals should exercise their clinical judgment and consult multiple sources. Refer to the latest local and national guidelines for clinical practice.

References

• Rungrojn A et al. Bacterial communities in Thai ticks: revealing geographical and methodological gaps in surveillance-a 25-year scoping review. Trop Med Health. 2026 Apr 17. doi: undefined. PMID: 41998767.


• Ahantarig A, et al. Tick-borne pathogens and diseases of animals and humans in Thailand. Southeast Asian J Trop Med Public Health. 2008 Nov;39(6):1015-32.


• Rathi N, Rathi A. Rickettsial infections: Indian perspective. Indian Pediatr. 2010 Feb;47(2):157-64.