Figure 1. There are two basophilic intranuclear inclusion bodies in the glandular epithelial cells (arrows). There are mononuclear cells (round basophilic cells) infiltrating the mucosa and there are granulocytes (smaller eosinophilic cells). Photo courtesy of Christopher Poulos at APHA Lasswade.

Adenoviral associated gizzard erosions: an overview and case example

Adenoviruses are medium-sized (70–100nm), double stranded DNA viruses that do not have a capsule (Hess, 2000; The International Committee on Taxonomy of Viruses (ICTV), 2012). They are classified into...

Figure 2. Classic pose of Marek's disease in a young chicken. Photo Grant Brereton.

How to navigate through the regulations and medications for backyard and pet poultry

The major problem with chicken vaccines is that the majority are only effective if young birds are given a primary course. For those vaccines it is not effective to vaccinate adult chickens that have...