High levels of vitamin A are found in foods of animal origin in the form of retinyl esters. Liver, fat, fish liver oils, and egg yolk are particularly good sources of vitamin A. Some plants and insects are also good sources of carotenoids. The dietary carotenoids found in dark, leafy greens and…
The turtle ear is a simple structure that sits caudoventral to the eye covered by a large scale called the tympanic scute. As in many reptiles, the external ear is absent in chelonians. The tympanic membrane sits flush against the skin just underneath the tympanic scute. There is one ossicle, the columella, which crosses the large tympanic cavity to insert medially on the oval window of the cochlea. A narrow Eustachian tube connects the middle ear to the oropharynx.
Aural abscesses are well-encapsulated, caseous plugs that slowly develop until it fills the tympanic cavity. The cause of aural abscessation is not completely understood…
Historically, routine Gram’s stains were performed in apparently healthy birds. As our understanding of avian medicine has grown, avian veterinarians have questioned the reliability and validity of Gram’s stain cytology as a screening test. Cytology is indicated when specific problems are reported during a detailed medical history or when…
