The pet dogs used for this study were those presented at the Central Veterinary Hospital (CVH), Dhaka from
January to December 2009. During the one year study period, a total of 3670 sick pet dogs were brought for
treatment at the CVH. All the patients were first registered in the patient register book including date, age, sex,
breed and complaint of the owners. Detailed clinical examination of each of the patient were carried out as
described by Samad (2008), which included a complete medical history like family medical history, vaccination
history, travel history, diet history, environmental history, birth history and potential source of intoxication.