It is a virus disease which is belongs to family poxviridae.
It is look like a brick shape and spread slowly. It can cause egg production and decrease the growth of young birds.
Warty, spreading eruptions and scabs on comb and wattles.
Caseous deposits in mouth, throat and sometimes trachea.
Poor egg production.
There is no treatment for fowl pox and prevention is through vaccination of replacement birds. Where preventative vaccination is used, all replacement chickens are vaccinated when the birds are six to ten weeks of age and one application of fowl pox vaccine results in permanent immunity. Vaccination of broilers is not usually required unless the mosquito population is high or infections have occurred previously. Chicks may be vaccinated as young as one day of age. During outbreaks, unaffected flocks and individuals may be vaccinated to help limit the spread. If there is evidence of secondary bacterial infection, broad-spectrum antibiotics may help reduce morbidity and mortalities. As mosquitoes are known reservoirs, mosquito control procedures may be of some benefit in limiting spread in poultry confined in houses.