close-up of rod-d salmonella typhi bacteria: gram-negative, flagellated pathogens causing typhoid fever and systemic

water virulence undefined typhoid typhi type transmission toxin systemic system spread spots secretion salmonella rose rodshaped resistance publichealth proteins pathogen pain microscopic microorganism membrane invasive intracellular intestinal infection iii gramnegative global gastrointestinal gastroenteritis flagellated fever factors epidemic enterobacteria enteric endemic effector disease cytoplasm contamination contaminated cellular carrier blood bacteria asymptomatic antigen antibioticresistant antibiotic abdominal