Marek's Disease in chickens is adisorder that affects young birds. It generally shows up in chickens duringtheir second year. Although it's not contagious, it can be passed from birds tohumans. Chicks are the most common species affected. The disease mainly occursin the shear or unborn chicken, usually resulting from a bacterial or viralinfection. Marek's Disease in chickens can be prevented by recognizing thesymptoms and seeking treatment as soon as possible. The disease only shows upwhen the chickens' nervous system is developing. In most other instances, thedisease only shows up as the paralytic form, meaning weakness or completeparalysis of one or both legs. This is why most treatment for Marek's Diseasein chickens happens early in the development of the chicken. However, in severecases, treatment may be delayed until the baby chicken is older and is able totake care of itself. Usually, within 2 weeks, owners will be able to take thechickens to the vet for treatment.
Marek'sDisease isusually treated with antibiotics. There are several different types ofantibiotics available, depending on the case. If the disease is diagnosedearly, it can be treated with an antibiotic called Metronidazole. Thistreatment is most successful in adult chickens that are still conscious,although it may not work if the chickens are paralyzed or have kidney orrespiratory disease. If the drug cannot penetrate the eggs, most expertsrecommend using Doxycycline. In chickens that are infected with the RSE virus,a metronidazole-based topical antibiotic treatment will prevent the virus fromreplicating. However, metronidazole cannot eradicate the pathogen, andtreatment will need to continue until the chick hatched and could enter theegg. If no clinical signs are present, the vaccination of the entire flock isusually sufficient. However, if clinical signs are present, an additional roundof metronidazole-based topical treatments is needed to provide completeprotection.
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