MICROORGANISM Flashcards
comes from the Greek word
mikros ,__ and organismos ,___
“small”
“organism“
MICROORGANISM
Is an organism that is Microscopic
MICROORGANISM
(too small to be seen by the naked human eye).
MICROORGANISM
are microscopic living organisms,
including bacteria, viruses,
protozoa, prions, and fungi.
MICROORGANISM
are harmless and play a vital role in maintaining health, such as aiding digestion and protecting the body from harmful organisms.
MICROORGANISM
Microorganisms that naturally live on or inside the body without causing harm .
NORMAL FLORA
Found in areas like the skin, mouth, intestines, and respiratory tract .
NORMAL FLORA
They help protect against harmful microbes by competing for nutrients and space.
NORMAL FLORA
An infection acquired in a healthcare setting that comes from external sources — meaning the microorganisms causing the infection originate from outside the patient’s body .
EXOGENOUS NOSOCOMIAL INFECTION
Contaminated hands, clothing, or improper hygiene.
Healthcare Workers
Non - sterile catheters, surgical instruments, or ventilators .
Medical Equipment
Contaminated surfaces, air, water, or other patients .
Hospital Environment :
Direct contact or droplets from coughing/sneezing .
Other Patients or Visitors
An infection acquired in a healthcare setting that arises from the patient’s own normal flora .
ENDOGENOUS NOSOCOMIAL INFECTION
Causes of ENDOGENOUS NOSOCOMIAL INFECTION
• Overgrowth of normal flora due to a weakened immune system or
prolonged hospital stay.
• Altered placement of normal flora into areas where they don’t usually
exist (e.g., during invasive procedures).
• Broad - spectrum antibiotics can kill beneficial bacteria, allowing
harmful microbes to grow unchecked.
