realistic cholera in water droplet for template decoration on the transparent background. concept of disease and b

africa anaerobic awareness bacteria bacterium cell cholera cholerae coli colony contamination dirty disease drink drop droplet fermentation flu germ glass guts hepatitis illness infection influenza isolated laboratory lactobacillus magnifier medical microbe microbiology microbiome microorganism monotrichous polio pollution probiotics rotavirus rural salmonella sanitation sign symptoms system transparent vector vibrio virus water