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Opportunistic infection. Bryan Smith & Imani Pyles. What is it?. An opportunistic infection is an infection caused by: pathogens , particularly opportunistic pathogens (bacterial, viral, fungal or protozoan) that usually do not cause disease in a healthy host

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opportunistic infection

Opportunistic infection

Bryan Smith



what is it
What is it?
  • An opportunistic infection is an infection caused by:
  • pathogens, particularly opportunistic pathogens (bacterial, viral, fungal or protozoan) that usually do not cause disease in a healthy host
  • A compromised immune system, however, presents an "opportunity" for the pathogen to infect.
  • Malnutrition
  • Recurrent infections
  • Immunosuppressing agents for organ transplant recipients
  • Advanced HIV infection
  • Chemotherapy for cancer
  • Genetic predisposition
  • Skin damage
  • Antibiotictreatment
  • Medical procedures
  • Pregnancy
types of infection
Types of Infection
  • Acinetobacter baumanni
  • Aspergillus sp.
  • Candida albicans
  • Clostridium difficile
  • Cryptococcus neoformans
  • Cryptosporidium
  • Cytomegalovirus
  • Histoplasma capsulatum
  • Isospora belli
  • Polyomavirus JC polyomavirus, the virus that causes Progressive multifocal leukoencephalopathy.
  • Kaposi's Sarcoma caused by Human herpesvirus 8 (HHV8), also called Kaposi's sarcoma-associated herpesvirus (KSHV)
  • Microsporidium
  • Pneumocystis jirovecii, previously known as Pneumocystis carinii f. hominis
  • Pseudomonas aeruginosa
  • Staphylococcus aureus
  • Streptococcus pyogenes
  • Toxoplasma gondii
hyperbaric chamber
Hyperbaric chamber
  • Hyper" means increased and "baric" relates to pressure.
  • Hyperbaric oxygen therapy (HBOT) thus refers to intermittent treatment of the entire body with 100-percent oxygen at greater than normal atmospheric pressures.
hyperbaric chamber1
Hyperbaric chamber
  • greatly increases oxygen concentration in all body tissues, even with reduced or blocked blood flow
  • stimulates the growth of new blood vessels to locations with reduced circulation, improving blood flow to areas with arterial blockage
  • causes a rebound arterial dilation after HBOT, resulting in an increased blood vessel diameter greater than when therapy began, improving blood flow to compromised organs
  • stimulates an adaptive increase in superoxide dismutase (SOD), one of the body's principal, internally produced antioxidants and free radical scavengers
  • aids the treatment of infection by enhancing white blood cell action and potentiating germ-killing antibiotics.