Serological Survey of Humans Exposed to Burkholderia mallei-Infected Equids: A Public Health Approach.

The research explores the potential transmission of Glanders – a fatal bacterial infection, from infected equids to humans, primary among those exposed such as equine handlers and veterinary professionals. Results suggest that despite exposure, no humans tested showed traces of the bacteria but identified the continued exposure as a persisting risk.

Background of the Study

• The study investigates Glanders, a fatal bacterial infection in equids (a taxonomic family that includes horses, donkeys, and zebras) caused by the bacteria Burkholderia mallei.
• Humans can acquire this infection through prolonged direct contact with infected equids.
• Recent reports highlighted the resurgence of equine glanders in numerous countries, presenting potential public health risks, especially to those in frequent close contact with equids, such as equine handlers and veterinary professionals.

Methods and Participants of Study

• Samples of sera were collected from 538 humans, primarily including individuals working with equids or veterinary professionals who have been exposed to Glanders-infected equids.
• The collected samples were checked using ELISA (Enzyme-linked Immunosorbent Assay) and the complement fixation test for the presence of Burkholderia mallei-specific antibodies.

Findings of the Study

• Results showed that all tested samples were negative for Burkholderia mallei-specific antibodies. This result indicates no incidence or transmission of human Glanders during the survey period.
• However, it is important to note that occupational exposure to Burkholderia mallei-infected equids remains a significant concern and a key risk factor for transmitting the disease to humans.

Recommendations and Conclusion

• The researchers emphasize the need for intersectoral collaboration and coordination among various health authorities, particularly those in veterinary, human, and public health fields.
• This coordinated approach is aimed at continuing surveillance and monitoring of human Glanders, thereby adopting the one health concept—a concept that links the health of humans, animals, and environment.