Introduction To Microbiology Flashcards
What are no cellular organisms?
Viruses
What are prokaryotes?
Bacteria
What are eukaryotes?
Fungi and Parasites
What are microorganisms?
Organisms that cannot be detected by the naked eye
What are some examples of microorganisms?
Viruses, bacteria, fungi, protozoa and helmiths.
What are pathogens?
Microorganisms that can cause diseases
What are opportunistic pathogens?
Microorganisms that can cause disease under certain conditions mainly when host is immune suppressed.
What are microbiota?
Commensal microorganisms that live with the host without causing disease, symbiotic conditions.
What is the structure of viruses?
Non-cellular organisms,
Can be DNA or RNA enclosed in their membrane,
Viral proteins
What do the virus shapes depend on?
The family they are in
What is the structure of bacteria?
Prokaryotic cells,
They have a cell wall,
They have external structures,
They have a plasma membrane,
They have intracellular structures.
What are the two different types of cell walls a bacteria can have?
Gram-positive and gram-negative
What do gram-negative bacteria have?
Lipopolysaccharides which are also called endotoxin
What do gram-positive bacteria have?
Thick layer of peptidoglycan
What is the gram stain technique?
A test where cells are stained with crystal violet and Gram’s iodine solution and washed with a decolorizer.
