Epidemiology of epizootic lymphangitis of carthorses in northern Ethiopia using conventional diagnostic methods and nested polymerase chain reaction.
Authors: Hadush Birhanu, Michaelay Molla, Menghistu Habtamu Taddele, Abebe Nigus, Genzebu Abreha Tesfaye, Bitsue Habtom Kiros, Afera Berihun, Duguma Bojia E, Gugsa Getachew, Ameni Gobena
Journal: BMC veterinary research
Summary
# Editorial Summary: Epizootic Lymphangitis in Ethiopian Carthorses Epizootic lymphangitis, caused by *Histoplasma capsulatum* var. *farciminosum*, remains a significant economic burden for carthorse owners in Ethiopia, yet diagnostic protocols and epidemiological data remain poorly characterised across different regions. Researchers in northern Ethiopia employed both conventional diagnostic methods alongside nested PCR to investigate disease prevalence, distribution and risk factors affecting working equine populations. The nested PCR approach proved substantially more sensitive than traditional diagnostic techniques, enabling more accurate case identification and revealing previously undetected infections within affected herds. Findings highlighted critical gaps in current control measures and identified specific epidemiological patterns relevant to carthorse populations, with important implications for implementing evidence-based biosecurity protocols and targeted surveillance programmes. For equine professionals managing working horses in endemic regions, these results underscore the diagnostic limitations of conventional methods alone and support adoption of molecular techniques for reliable case identification—essential for implementing effective herd-level disease management and preventing transmission within draught horse operations.
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Practical Takeaways
- •If working with carthorses in Ethiopia or similar regions, be aware that epizootic lymphangitis is common and causes chronic debilitating disease affecting work capacity and livelihoods
- •Conventional clinical and laboratory diagnostics may miss infected animals; PCR-based confirmation is more reliable for diagnosis and control decisions
- •Current lack of effective control measures means prevention through management and early detection remain the primary strategies available to carthorse owners
Key Findings
- •Epizootic lymphangitis is a significant endemic disease in working carthorses in northern Ethiopia with substantial economic impact on owners
- •Nested PCR provides improved diagnostic sensitivity compared to conventional diagnostic methods for detecting HCF infection
- •The study established baseline epidemiological data on EL prevalence and distribution across northern Ethiopian regions