<prompt> The difference between contamination and infection is that in infectionInfectious agent is on body surface or on non-human objectsInfectious agent is in the body of humanAhropods on the body surfaceInfectious agents on clothes  <response>: INFECTION The entry and development or multiplication of an infectious agent in the body of man animals An infection doesn;t always cause infection Levels of infection:- 1. Colonization- Staphylococcus aureus in skin and nasopharynx 2. Subclinicalinapparent infection- Polio 3. Latent infection- HSV 4. Manifestclinical infection CONTAMINATION:- The presence of an infectious agent on a body surface, also onin clothes, bed,toys, instruments or other inanimate substances including water, milk and food Reference: Park;s textbook of Preventive and Social medicine; 23rd edition;, Page no. 92 