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Micro-organisms live naturally in this material and give the ears a characteristic slightly yeasty odor, even when healthy. When infected, the ears can give off a strong disagreeable smell. It is not uncommon for a veterinarian to sniff a dog's ears to try to detect any potential bacterial or fungal infection.
Fishy smelling urine is a primary identifying symptom in infant children (Trimethylaminuria literally meaning "trimethylamine in urine"). [citation needed] Trimethylamine is also released in the person's sweat, reproductive fluids, and breath, and can give off a fishy odor when the concentration of trimethylamine is high enough to be detected.
[13] [14] Genetic deficiencies of the FMO3 enzyme cause primary trimethylaminuria, also known as "fish odor syndrome". [ 8 ] [ 15 ] FMO3 is also involved in the metabolism of many xenobiotics (i.e., exogenous compounds which are not normally present in the body), [ 9 ] [ 10 ] such as the oxidative deamination of amphetamine .
Trimethylamine (TMA) is an organic compound with the formula N(CH 3) 3.It is a trimethylated derivative of ammonia.TMA is widely used in industry. [5] [6] At higher concentrations it has an ammonia-like odor, and can cause necrosis of mucous membranes on contact. [7]
Uterus of a dog. Pyometra in a dog. The most obvious symptom of open pyometra is a discharge of pus from the vulva in a female that has recently been in heat. However, symptoms of closed pyometra are less obvious. Symptoms of both types include vomiting, loss of appetite, depression, and increased drinking and urinating. [1]
There are many different factors which influence a dogs ability to successfully determine the directionality of a track. The age, sex, [1] and even personality [12] of a dog can greatly influence tracking behaviour. Male dogs have been described to more accurately determine the direction of a trail than female dogs. [1]
As dogs grow older, their performance and ability to learn new smells is reduced. Female dogs have a greater sense of smell than males. A variety of diseases can decrease a dog's sense of smell, such as canine distemper and nasal mites. Dogs have an enhanced sense of smell when fed a high-fat, low-protein diet. There are a number of theories ...
All parts of the dog's mercury are highly poisonous. Methylamine (mercurialine) and trimethylamine are thought to be present, together with a volatile basic oil, mercurialine, and saponins. [6] The scent of the plant is often described as 'foetid' due to the presence of trimethylamine which often gives off a rotting fish smell. [5]