Pathogens Flashcards
What bacteria is
- round shape
- single units, clustered or in chains
- Gram Positive or Gram Negative
- Single celled organisms that reproduced by cell division
Cocci Bacteria
What Culturing for Cocci Bacteria?
Gram Staining
Blood Agar
Chocolate Agar (Grows Neisseria)
Thayer - Martin Agar (Grows Neisseria)
These Ophthalmic Infections are caused by which bacteria?
- staphylococcus
- streptococcus pneumoniae
- neisseria gonorrhoeae
Cocci Bacteria
What bacteria is :
- rod shaped
- single units, clustered or in chains
- Gram Positive or Gram Negative
- Single celled organisms that reproduce by cell division
Bacilli Bacteria
What Culturing is for Bacilli Bacteria?
Gram Staining Blood Agar (grows most bacteria but not Haemophilus) Chocolate Agar (grows Haemophilus) MacConkey Agar (grows Pseudomonas)
These Ophthalmic Infections are caused by which bacteria
- Pseudomonas Aeruginosa (bacterial conjunctivitis)
- Haemophilus Influenzae (bacterial keratitis)
Bacilli Bacteria
What pathogen is :
- A string of DNA or RNA surrounded by a protein coat - Very tiny : 10 to 300nm in size
- Can only reproduce if they infect a cell because they utilize the structures in their host to produce
Viruses
What is Culturing for Viruses?
Polymerase Chain Reaction
Antibody Test
These Ophthalmic Infections are caused by which pathogen?
Mollusum Contagiosum Virus
Herpes Simplex Virus
Varicella-Zoster Virus
Virus
What pathogen is :
- Eukaryotic Unicellular Organisms (single celled organisms with complex structures)
- Size varies from 5 microns to 1mm in diameter
- May become encysted from further protection
- Often transmitted by contaminated food/water or insect bites
Protozoa
What is Culturing for Protozoas?
Microscopic Evaluation
Polymerase chain reaction
Enzyme linked immunosorbent assay (ELISA) to detect antibodies
These Ophthalmic Infections are caused by which pathogen?
Acanthamoeba (found in swimming pools or hot tubs ; risk for contact lens wearers)
Toxoplasma Gondii
Protozoa
What Pathogen is :
- Larger than bacteria
- Contain multiple chromosomes
- Commonly known as mold or yeasts
- Develop and disperse spores
Fungi
What is Culturing for Fungis?
Blood agar for fungi growth
Sabouraud’s media for fungi growth
Calcofluor white stain for fungi or yeast
These Ophthalmic Infections are caused by which pathogen?
Aspergilus
Fusarium
Fungi
