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Micro exam 6 Flashcards

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1
Q

Ixodes

A
  • tick
  • bloodsucking
  • Lyme disease and babesiosis, and agents of tick paralysis.
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2
Q

Dermacentor

A
  • tick
  • bloodsucking
  • vectors tularemia, RMSF, and Colorado tick fever, and agents of tick paralysis.
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3
Q

Amblyomma americanum

A
  • tick
  • bloodsucking
  • vectors for tularemia, RMSF, lyme disease and agents of tick paralysis.
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4
Q

Rhipicephalus sanguineus

A
  • tick
  • vector for ehrlichiosis & babesiosis in dogs
  • vector RMSF, Mediterranean spotted fever.
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5
Q

Pyemotes

A
  • mite
  • dermatitis (hay and straw itch mites)
  • bite the person and the digestive juices provoke allergic responses.
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6
Q

Demodex folliculorum

A
  • mite
  • follicular invasion
  • results in puritis and acne like dermatitis
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7
Q

Eutrombicula

A

-Chigger dermatitis.
-Larval mite infests reptiles, birds, and mammals.
-bites doesn’t burrow
-Adult and nymph are predators of small terrestrial
invertebrates or feed on their eggs

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8
Q

Sarcoptes scabiei

A

-Burrowing mite that is the most serious of all the
mites.
-Female is fertilized on the skin surface, burrows, lays eggs and dies (large part of problem)
-intense puritis that can persist for weeks after treatment
-direct contact (STI), crowded living conditions
-permethrin (DOC)
-ivermectin

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9
Q

Canine scabies

A
  • accident infestation
  • canine variety does not burrow or reproduce in people.
  • permethrin (DOC)
  • ivermectin
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10
Q

Crusted (Norwegian) scabies

A
  •  scaling lesions that are filled with mites → very pruritic.
  • linked to AIDS
  • permethrin (DOC)
  • ivermectin
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11
Q

Pediatric scabies

A
  • presents with erythematous crusted lesions.
  • similar to Norwegian scabies.
  • permethrin (DOC)
  • ivermectin
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12
Q

Pththirus pubis

A
  • Crab louse
  • nits (louse eggs) are cemented to pubic hair
  • bite irritation occurs because of adults feeding.
  • transmitted via sexual contact or bedding
  • permethrin
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13
Q

Pediculus humanus

A
  • Nits are cemented to clothing fibers or human hair
  • bite irritation (bloodsuckers)
  • body louse is the vector for epidemic typhus
  • wartime conditions, crowding
  • permethrin
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14
Q

Cimex lectularius

A

-bedbug
-nocturnal bloodsucking insect that transports
microbes like cockroaches.

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15
Q

Triatoma spp.

A
  • kissing bugs
  • bloodsucking insects of USA and Latin America
  • serve as vectors for Chagas disease.
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16
Q

Pulex irritans

A
  • human flea

- parasite, plague and tapeworm vector.

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17
Q

Ctenocephalides spp

A
  • dog and cat fleas

- fleabite allergic dermaitis

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18
Q

Xenopsylla cheopis

A
  • rat flea

- bloodsucking and vector for plague

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19
Q

Tunga penetrans

A

-flea
-female burrows into the skin and grows to
the size of a pea
-painful nodular swelling

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20
Q

Simulium spp

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A
  • black flies
  • bloodsucking
  • transmits onchocerciasis
21
Q

Phlebotomus spp

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A
  • sand flies
  • blood sucking
  • transmit leishmaniasis
22
Q

Chrysops spp

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A
  • deer flies
  • bloodsucking
  • vector of tularemia and loaiasis
23
Q

Glossina spp

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A
  • tsetse flie
  • bloodsucking
  • african sleeping sickness
24
Q

dermatobia hominis

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A

human skin bot

  • fly catches mosquito, glues egg
  • dermatobiasis
25
Tinea barbae
- T verrucosum | - T rubrum
26
Tinea capitis
- M canis - T mentagrophytes - T tonsurans** -griseofulvin
27
Tinea corporis
- M canis - T mentagrophytes - T rubrum
28
Tinea cruris
- E floccosum - T mentagrophytes - T rubrum** -diabetes, obesity, perspiration in excess
29
Tinea pedis
- most prevalent of all dermatophytoses - E floccosum - T mentagrophytes - T rubrum**
30
Tinea unguium
- E floccosum - T mentagrophytes - T rubrum
31
Tinea manus
- T mentagrophytes | - T rubrum
32
Hortaea werneckii
- tinea nigra - dimorphic - Superficial fungal agent - produces brown or black lesions on palms and the soles. - painless - iodine or azole creams
33
Sporothrix schenckii
- subcutaneous - pear-shaped conidium resemble a daisy - chronic granulomas & necrosis - traumatic inoculation of thorn, wood splinters, etc - develop nodules, abscesses, ulcers along lymphatics - DOC Amphotercin B or itraconazole
34
Madurella mycelomatis
- subcutaneous (dimorphic) - mycetoma: tumefaction and many drainage sinus - granules or microcolonies in sinuses - africa
35
Pseudallescherica boydii
- subcutaneous (dimorphic) - mycetoma: tumefaction and many drainage sinus - granules or microcolonies in sinuses - white grain mycetoma - USA and latin america
36
Fusarium oxysporum, F solani
- subcutaneous (dimorphic) - mycetoma: tumefaction and many drainage sinus - granules or microcolonies in sinuses - tropical areas, Latin America - opportunistic
37
Acinetobacter baumanni
- Gram negative rods-coccobacilli - cause of cellulitis - assoc w/ trauma & use of invasive devices - multi-drug resistant & pan-resistant
38
Pasteurella multocida
- gram negative - normal microb in mouth of CATS and dogs - cellulitis: suspect if associated with a CAT >> dog bite - purulent drainage
39
Aeromonas hydrophila
- gram negative, motile, bacillus - facultative anaerobe - fresh water - cellulitis - necrotizing fasciitis
40
Vibrio vulnificus
- gram negative, motile, vibirio - facultative anaerobe - halophile (salt water) - cellulitis - necrotizing fasciitis (necrotizing infection - oysters)
41
coliform bacteria
- all gram negative rods - ferment lactose - facultative anaerobes CHEEK - citrobacter - hafnia - enterobacter - e. coli - klebsiella
42
enterobacteriaceae
- gram negative rods - facultative anaerobes - EEK: ferment lactose - PSSYS: do not ferment lactose PESSKEY - Proteus - Enterobacter - Shigella - Salmonella (osteo w/ sickle cell) - Klebsiella - E. Coli (osteo in neonates) - Yersinia - Serratia (osteo IVDU)
43
Fournier's gangrene
necrotizing fascitis of genitalia anaerobes - Bacteroids - Clostridium - Fusobacterium AND E. coli or Klebsiella
44
Prevotella
- gram negative anaerobe, bacilli - normal microbe of mouth - -abscess: mouth, pharynx, brain, lungs - encapsulated - Strong LPS lipid A response - IgG/A/M proteases - metronidazole: DNA strand breakage & destabilization - clindamycin: protein synthesis - amoxicillin-clavulanate: beta lactam + beta-lactamase inhibitor -beta lactams if resistance
45
Fusobacterium
- gram negative anaerobe, bacilli - normal microbe of mouth - encapsulated - strong LPS lipid A response - Lemierre's syndrome: jugular venous suppurative thrombophlebitis - osteo & peridontal infections - metronidazole: DNA strand breakage & destabilization - clindamycin: protein synthesis - amoxicillin-clavulanate: beta lactam + beta-lactamase inhibitor -beta lactams if resistance
46
Bacteroids fragilis
- gram negative anaerobe, bacilli - most common non-sporeforming opportunistic anaerobe - deep pain & tenderness below diaphragm - B-lactamase - bile resistant - SOD & catalase (exception to rule) - PSA- essential to abscess formation - -induce host cell immune response - -attachment to peritoneal mesothelium (surrounded by collagen capsule) - -inhibits complement mediated killing (dissemination) - weak LPS lipid A response - encapsulated - metronidazole: DNA strand breakage & destabilization - carbapenems: beta-lactam - beta-lactam + beta latamase inhib -clindamycin: inhibits protein synthesis (if resistant)
47
peptostreptococcous
- gram POSITIVE, cocci, anaerobe - normal microbe: mouth, colon, female GU tract - brain, breast, pulm infection - brain abscess + viridans strep - metronidazole: DNA strand breakage & destabilization - clindamycin: protein synthesis - amoxicillin-clavulanate: beta lactam + beta-lactamase inhibitor -beta lactams if resistance
48
propionibacterium acnes
- gram positive pleomorphic bacilli - aerotolerant anaerobe - normal skin flora - sebaceous glands - Opportunistic infections w/ prosthetics & IV lines
49
Meleney's synergistic gangrene
S. aureu and microaerophilic streptococci

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