The genus Listeria currently contains 10 species: L. fleischmannii, L. grayi, L. innocua, L. ivanovii, L. marthii, L. monocytogenes, L. rocourtiae, L. seeligeri, L. weihenstephanensis and L. welshimeri. L. dinitrificans, previously thought to be part of the Listeria genus, was reclassified into the new genus Jonesia.tudies suggest up to 10% of human gastrointestinal tracts may be colonized by L. monocytogenes. Nevertheless, clinical diseases due to L. monocytogenes are more frequently recognized by veterinarians, especially as meningoencephalitis in ruminants. See: listeriosis in animals.
1 Sweating/Irritation Interestingly, another forgotten cause of underarm pain is sweating. 2  Sweating itself doesn't lead to underarm pain, but what it does do is irritate the skin, which in turn can cause itching or burning that may result in pain.
Fixing Underarm Problems. 1  1. Lighten underarms using simple remedies. Darkening of underarm skin can have a number of causes, including dead skin accumulation or a reaction to a deodorant. 2  2. Change your deodorant if your underarms are irritated or bothersome.