Exam 2 Flashcards
Name 3 normal flora organisms on skin and briefly describe each.
Staphylococcus epidermidis:
-lives in SALTY environment
Propionibacterium acnes:
-lives on fatty acids in sebum secreted by sebaceous glands in follicles
Micrococcus luteus:
-obligate aerobe
-also found in mouth, mucosa, oropharynx, upper resp
Name 3 gram positive cocci that are Staph and Strep oriented.
Staphylococcus epidermidis
Staphylococcus aureus
Streptococcus pyogenis
What organism are staphylococcal infections generally caused by and why?
Staphylococcus aureus because it secretes enzymes and toxins to break down skin
Define folliculitis and how is it caused.
inflamation of follicle caused by bacterial or fungal infection
What organism is most common cause of strep?
Streptococcus pyogenes
AKA for boil?
Furuncle
What is a stye?
inflamed oil gland on eye lid
What causes scalded skin syndrome?
Staphylococcal aureus
(SSSS) Staphylcoccal Scalded Skin Syndrome
What exotoxin is released by the organism causing SSS?
Exfoliatoxin
What is an aka for scarlet fever and what organism causes this disease?
Scarletina
Streptococcus pyogenes
What exotoxin is released by the organism causing scarlet fever?
Eryhthrogenic toxin
Side affects of scarlet fever?
- Flat/Pink rash
- Can cause strep throat
- may develop into glomerulonephritis or rheumatic fever
What does glomerulonephritis do?
Causes immune response that blocks fenustrated capillaries ultimately blocking urine flow out of kideys
What is convalescence?
May regain strength after illness but still not necessarily well
What is the significance of Rebecca Lancefield?
Created Streptococcus classification based cell surface markers
What is an aka for Erysipelas and what organism causes it?
St. Anthony’s fire
Streptococcus pyogenes
What does Eysipelas do to an individual and how?
-Creates red skin of upper dermis and superficial lymphatics by secreting hyaluronidase
What bacterial skin infection lacks immunity and increases in returned events and severity?
Erysipelas
What is a pyoderma and what organisms cause it?
-anything that produces puss
Streptococcus
Cornebacterium
What organism causes impetigo?
- Streptococcus
- OR BOTH Streoptococcus and Staphylococcus
What 2 organisms causes common acne and how?
- Acne vulgaris
- Propionibacterium acnes
- By increasing sebaceous secretion from male sex hormones
What organisms causes burn infections?
- Pseudomonas aeruginosa
- Serratia marcescens
Symptoms of Pseudomonas aeruginosa infection?
- Greenish brown discoloration
- Smelly feet odor
- Grape like odor
What is the normal flora on flowers?
Pseudomonas aeruginosa
What organism is found in stagnant water and have pink color?
Serratia marcescens
What is the term for the thick crusty scab forming over burns?
Eschar
Name common organisms of bacterial eye infections?
Neisseria ghonorrhoeae Chlamydia Staphylococcus aereus Streptococcus pneumoniae Haemophilus influenza
What the term for conjunctivitus of a newborn?
Opthalmia neonatorium
What are 2 common organisms causing opthalmic neonatorum and their side affects?
Neisseria Ghonorrhoeae
Chlamydia trachomatis
-causes inflammation, scarring, and blindness of cornea
What is the term for inflammation of cornea?
Keratitis
What is the current treatment for opthalmic neonatorum
- Tetracycline
- Silver nitrate will work for ghonorrhea but not chlamydia
What microorganism classifications will cause conjunctivitis and which are more rare, contageous, and severe?
- Bacteria
- Virus- more contageous, least serious b/c virus communicate through respiratotry
- Fungi- rare
Treatment for bacterial conjunctivitis infections?
Sulfonamides (antibacterial)
What organism causes trochema?
Chlamydia trachomatis
Define fomite, vehicle, and vector.
Fomite- something you touch
Vehicle- something inside you like food poisoning
Vector:
-Mechanical- organism simply carries bacteria from one place to other
-Biological- organism transfers bacteria but is also affecting person as well
What is german measles?
Rubella
Name organisms of viral conjunctivitis.
Rubella Measles (rubeola) Varicella and Herpes Zoster Smallpox Molluscum contagiosa Warts
Where are the symptoms of rubella and where?
flat pink rash on trunk
arthritis and arthralgia (not from virus itself)
How is rubella transmitted?
Entry- mucous membrane
Exit- respiratory
What type of virus does the Herpes Zoster become after traveling from DRG to skin?
Lytic
What causes small pox, its sympomss, and transmission?
- Variola major and minor
- puss filled vessicles in mouth -> face/forearms/hands ->trunk & fever/backache/headache/meningitus/ensephilitus
- Entry: respiratory
What herpes virus is HHV-6?
Rubeola (measles)
