What is seen in Chromodacryorrhea in rats?

Red tears (chromodacryorrhea) in rats are due to porphyrin pigments secreted by Harder’s glands and are believed to involve muscarinic mechanisms. Chromodacryorrhea was observed in rats treated with pilocarpine, oxotremorine and neostigmine and this response was blocked by anticholinergic drugs.

Is porphyrin normal in rats?

Porphyrin (a red-brown pigment) is a normal secretion produced by the tear gland around rat eyes. When the animal is not grooming, the pigment builds up around the eyes, nose, and on the fur.

Which animal can produce red tear?

Chromodacryorrhea (“red tears”) in a rat. Note typical encrustations around the eyes due to release of porphyrins from the Harderian lacrimal glands. “Red tears” frequently indicates that the animal has been subjected to some form of stress (eg, chronic respiratory disease, changes in environment, etc).

Do mice have porphyrin?

Mice have a large horseshoe-shaped Harderian gland deep within the orbit. Secretions from the gland contain varying amounts of reddish-brown porphyrin pigment depending on the physiologic state, age, strain and sex of the mouse.

Who are the actors in the lab rats?

Disney Channel’s “Lab Rats” stars Tyrel Jackson Williams as Leo, Billy Unger as Chase, Spencer Boldman as Adam and Kelli Berglund as Bree. 1960s bow tied, lab coated scientist is pictured with a white mouse.

What kind of rat has a gray body?

Two primary species of rats inhabit North American homes: the roof rat and the Norway rat. Norway rats, sometimes called brown or sewer rats, are identifiable by their stocky, gray-brown bodies.

What kind of diseases do mice and rats have?

Viral diseases of mice and rats are common. However, most diseases are subclinical and important only in laboratory animals in which they have the potential to have a significant effect on research. Sialodacryoadenitis virus, a coronavirus, causes inflammation and edema of the cervical salivary glands in rats.

What should the relative humidity be for rats?

An acceptable range of relative humidity is 30%–70%. Both temperature and humidity regulation are important to prevent ringtail and exacerbation of respiratory disease. Avascular necrosis of the tail, or ringtail, occurs primarily in young rats in low-humidity environments.