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skin bacterial Infec
WVSOM -- SKIN -- Bacterial skin and soft tissue infections
| Question | Answer |
|---|---|
| how do bathing habits affect bacterial infections? | too much antibactiral soap kills normal flora |
| who do bacteria help prevent infections by pathogens? | take up spaces on skin that could be taken by a pathogen |
| what colonizes dry areas? | gram - cocci and aerobic/anaerobic diphteroids |
| what colonizes moist areas? | faculatative and anaerobic gram-neg rods |
| why do bedridden patients tend to increase in gram-geg rods? | fiber nectin receptors become diminished which allows for gram-neg to grow; why opportunistic diseases occur in hospitals |
| what are the most frequent bacterial pathogens? | S aureus and S. pyogenes |
| what is propionibacterium acnes? | resident flora; gram + rods; clogs sebum and causes acne |
| S. epidermidis? | gram + cocci; resident flora |
| Waht is micrococcus sp? | gram + cocci; resident flora |
| What is corynecacterium sp? | Gram + rods; diphteroids; resident flora |
| What is lactobacillus? | gram positive rods; normal flora |
| what are commmon exogenous S. aureus infections? | abscesses, toxic shock adn bacteremia |
| what are frequent exogenous S. pyogenes infections? | cellulitis, lymphangitis |
| What exogenous infection does H. influenzae cause? | cellulitis |
| how is H. influenze seen under microscopy? | gram - rods |
| What exogenous infections does E. coli cause? | bed sores |
| What exogenous infections does C. perfringins caue? | gas gangrene |
| how is C. perfringins transmitted? | trauma. found in soil |
| what does Francisella tularensis cause? | tularemia (gram - rods) |
| what does P. aeruginosa cause/ | hot tub infection |
| what does P. cepacia cause? | foot rot |
| waht does M. mariun cause? | "fish tank cellulitis" (acid fast) |
| what does M. leprae cause? | leprosy (acid-fast) |
| who do bacteria gain entry to cause exogenous infections? | entry thru tiny abrasions in skin; maceration helps gain excess; trauma; hosptial procedures; pressure injury; compromised blood supply; decubitous ulcer |
| what is maceration | moisture trapped against skin |
| what bacteria is seen in decubitus ulcer? | mixed infection of S. aureus, S. pyogenes adn enteric organism |
| What skin infection does H. influenza cause? | conjunctivites; early cellulitis |
| What is diabetic foot? | a mixed bacterial infection |
| what are some endogenous infections that result in skin rashes? | primary syphallis, diabetic foot, conjunctivitis, leprocy, meninococemia, secondary syphallis, rocky mountain spotted fever, gonococal septicemia, toxic shock, scarlet fever, sckaled skin |
| What bacteria is responsible for syphalis? | treponema pallidum |
| what skin problems does primary syphilis cause? | lesions |
| what is seen on the skin with lepracy | skin infections resulting in scaring |
| How does meningococcemia cause skin lesion? | from blood stream or by direct extension of an infection site deep within the tissues |
| Where is secondary syphillis most often seen? | prisons |
| what bacteria causes Gonococcal septicemia cause? | Neisseria gonnorrhoeae |
| what bacteria causes toxic shock? | S. aureus |
| what causes rash in toxic shock syndrome? | toxin release |
| what bacteria causes scarlet fever? | toxin from S. pyogenes |
| what causes scalded skin syndrome? | toxin form S. aureus |
| what skin problems are seen form noninfectious and secondary to septicemia or other sytemic infections? | hemorrhages and petechiae |
| What is the licial name for epidermal bacterial infections? | impetigo, folliculitis, ecthyma gangranosom |
| what bacteria causes impetigo? | grp A strep adn S. aureus |
| what bacteria causes folliculitis | a. aureus and P. aeruginosa |
| what bacteria causes ecthyma gangranossom? | P. aeruginosa |
| What skin in fectino is seen in the dermis? | erysipelas |
| what causes erysipelas? | grop A strep |
| What do absesses of the fat and dermis cause? | furuncle and carbuncle |
| what bacteria causes abscesses? | S. aureus |
| What bacteria cause cellulitis? | group A strep and/or S. aeureus |
| where is necrotizing fasciitis seen? | in fat and fascia |
| what bacteria causes necrotizing fascitis? | mixed anaerobic and faculative organisms; group A strep |
| what is myonecrosis? | infection of muscle (gas gangrene) |
| what bacteria causes clostidial myonecrosis? | C. perfringens |
| What is the most common skin disorder/ | acne vulgaris |
| what causes acne vulgaris? | excessive sebum production secondary to androgen stimulation |
| What causes abnormal follicular plugging? | abnormal follicular keratinization |
| what is Erysipelas? | infection that rapidly invades adn spreads thru the lymph. Produces overlying skin streaking and regional lymph node swelling and tenderness; occurs most time on legs |
| what bacteria causes lymphangitis? | s. pyogenes |
| What does V. vulnificius cause? | hemorrhagic cellulitis |
| how do people get hemorrhagic cellulitis? | eating raw oysters |
| What causes streptococcal cellulitis? | S. pyogenes |
| what causes sycosis barbae? | S. aureus; infection of hairs of the beard |
| what is a carbuncle? | series of boils that have coalesced together |
| what is hidradentis suppurativa? | S. aureus infection of the apocrine sweat glands; usually in groin but can be in arm pits; apocrine glands swell and rupture |
| what is erythrasma? | corynebacterium minutissum; presents like candida and difficult to differentitate |
| What causes ecthyma gangranosum? | pseudomonas aeuginosa |
| what bacteria is tranfered from cat and dog bites? | Pasteurella multocida (gram - rods) |
| What is cat scratch fever? | Bartenella henselae (gram - aerobic rods); causes bacillary angiomatosis in Immunocompromised |
| what is bacillary angiomatosis? | knots of capillaries |
Created by:
tjamrose
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