text: Streptococcal pharyngitis Chlamydia
  Typhoid fever
  Tuberculosis
  Viral
  Rotavirus
  Hepatitis C
  Human papillomavirus (HPV)
  Parasitic
  Malaria
  Giardia lamblia
  Toxoplasma gondii
  Fungal
  Candida'''
  Histoplasmosis
  Dandruff
  Causes and transmission of infectious diseases
  Infections may be caused by bacteria, viruses, fungi, and parasites. The pathogen that causes the disease may be exogenous (acquired from an external source; environmental, animal or other people, e.g. Influenza) or endogenous (from normal flora e.g. Candidiasis).
  The site at which a microbe enters the body is referred to as the portal of entry. These include the respiratory tract, gastrointestinal tract, genitourinary tract, skin, and mucous membranes. The portal of entry for a specific microbe is normally dependent on how it travels from its natural habitat to the host.
  There are various ways in which disease can be transmitted between individuals.
  These include:
  Direct contact - Touching an infected host, including sexual contact
  Indirect contact - Touching a contaminated surface
  Droplet contact - Coughing or sneezing
  Fecal–oral route - Ingesting contaminated food or water sources
  Airborne transmission - Pathogen carrying spores
  Vector transmission - An organism that does not cause disease itself but transmits infection by conveying pathogens from one host to another
  Fomite transmission - An inanimate object or substance capable of carrying infectious germs or parasites
  Environmental - Hospital-acquired infection (Nosocomial infections)