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.
In this way, underarm pain can actually cause anxiety, rather than the other way around. Checking if you lymph nodes are swollen is something you can do yourself: simply feel under your arms and check for any small, hard lumps.
1. Trauma or Injury. One of the most common causes of severe upper arm pain is an injury to one or more of its parts. A fracture (broken bone) or a sprain in the arm due to a fall may result in extreme upper arm muscle pain. The symptom might not be experienced immediately but it may develop gradually as you move your arm.