Any environmental bacteria or viruses especially if its mother was sick at the time of lambing eg clostridial diseases, listeriosis, pneumonia, starvation, hypothermia, septicaemia, navel ill, enteritis, joint ill, toxoplasmosis, chlamydophilosia and campylobacter

Eosinophilic enteritis is not a kind of cancer.

The genus species of necrotizing fasciitis is Streptococcus pyogenes.

Acute necrotizing ulcerative gingivitis is mainly seen in young adults

One can find more information about enteritis by checking out local hospital and inquiring there. Local hospitals will be able to diagnose and give professional information about enteritis.