Homa ya matumbo
Homa ya matumbo (kwa Kiingereza typhoid fever) husababishwa na bakteria anayeitwa Salmonella Typhi. Ugonjwa huu huambukizwa kwa mtu kula au kunywa chakula au maji yaliyo na kinyesi cha mtu aliyambukizwa.<ref name="Baron">{{cite book |author=Giannella RA |chapter=Salmonella |title=Baron's Medical Microbiology (Baron S et al., eds.) |edition=4th |publisher=Univ of Texas Medical Branch |year=1996 |url=http://www.ncbi.nlm.nih.gov/books/bv.fcgi?rid=mmed.section.1221 |isbn=0-9631172-1-1}}</ref> Bakteria hawa hutoboa na kunyonya chakula kwenye matumbo ya binadamu.