spirilla bacteria

amphitrichous animal aquatic bacillus bacteria bacterial bacterium biology campylobacter campylobacteriosis cancer cell coccus corkscrew diarrhea disease food gastric germs gram helicobacter human illness illustration infection jejuni lophotrichou medical microbe microbiology negative peptic pneumonia poisoning pylori salmonella sepsis shaped sick sickness spiral spirilla spirillaceae spirillum ulcers water