ID Flashcards
What are the signs/symptoms of early sepsis and septic shock?
Early sepsis: fever, vasodilation, warm flushed skin, +/- visible source of infection
Septic shock: organ hypoperfusion, pulmonary edema (ARDS), AMS, acute renal failure, GI bleeding, angina, DIC
When working a pt up for sepsis and running a blood culture, how many sites should you get blood from?
2
How do you treat sepsis?
IV fluids
Vasoconstrictive agents
Broad spectrum abx (until culture comes back)
Insulin (BS 80-110)
Corticosteroids
What do you monitor in pts with sepsis?
Serum lactate, base deficit, & pH to evaluate progression
Toxic shock syndrome is commonly seen in what population?
90% of cases are in women of childbearing age
What is the most common toxin that causes toxic shock syndrome?
TSST-1
What are the signs/symptoms of toxic shock syndrome?
Fever
Macular rash
Systemic hypotension
Vomiting/diarrhea
Myalgias
Disorientation
Lethargy
How do you treat toxic shock syndrome?
Supportive care
Abx: nafcillin or oxacillin (for staph), PenG + clindamycin (for strep)
Monitor cardiac, renal, & pulm
Aside from menstruation products, what other things can cause toxic shock syndrome?
Diaphragm use
IV drug use
Osteomyelitis
Pilonidal abscess
Septic arthritis
Cellulitis
Burns
What is the definition of a fever of unknown origin?
Fever that persists > 3 weeks without expected response to treatment
What temp meets the criteria for fever of unknown origin along with the > 3 week duration?
100.9F (38.3C)
To be diagnosed with a fever of unknown origin, must the fever be consistent?
No, it can be intermittent, relapsing sustained, or temperature-pulse disparity
What causes lyme disease?
Spirochete borrelia burgdorferi carried by the blacklegged tick (deer tick)
What are the signs/symptoms of lyme disease?
Early (3-30 days post bite): fatigue, fever, chills, muscle/joint aches, erythema migrans (rash @ site of bite) “target like” or “bulls-eye” shape
Late (days - months post bite): severe HA, stiff neck, numbness/tingling of the face/hands/feet, rashes at sites other than initial bite, heart palpitations
How long after a tick bite can you test for lyme disease?
Lyme antibody testing 4-6 weeks after tick bite
How do you treat lyme disease?
Early: 7-14 days of PO doxy or amoxicillin or cefuroxime
Late w/neuro symptoms: 14-21 days of PO or IV doxy or ceftriaxone
Late w/carditis: 14-21 days of PO or IV doxy or amoxicillin or cefuroxime
Late w/arthritis: 28 days of PO doxy or amoxicillin or cefuroxime
When can you provide prophylactic treatment for lyme disease?
Tick bite occurred in area w/high incidence
Tick was removed in last 72 hrs
Tick was engorged
Tick was blacklegged type
Pt has no contraindications to doxy
What causes Rocky Mountain Spotted Fever?
Rickettsia rickettsii carried by american dog tick, rocky mountain wood tick, or the brown dog tick
What is the classic triad of symptoms of rocky mountain spotted fever?
Fever
Tick exposure
Rash
What are symptoms of rocky mountain spotted fever?
Fever/chills/malaise
HA
Myalgias
Vomiting
Rash 2-4 days after fever (macules that transition to petechiae that moves from wrists/ankles to trunk to palms/soles)
What can occur in pts w/rocky mountain spotted fever later in the disease?
Amputations (2/2 vascular inflammation & damage)
Hearing loss
Paralysis
Mental disability
What is the 1st line treatment for rocky mountain spotted fever?
Doxy (100mg q12 hrs for adults, 2.2mg/kg BID for kids) x 5-7 days
What mosquito carries malaria?
Female anopheles
How do you test for malaria?
Microscopic exam of thick & thin blood smears repeated every 12-24 hrs OR
Antigen detection test (BinaxNOW)
How many sets of negative blood smears are needed to rule out malaria?
3
What is the treatment for malaria?
Chloroquine OR
Hydroxychloroquine
What are the signs/symptoms of malaria?
High fever
Shaking chills
HA
N/V/D
Neuro complaints
Myalgias
Flu-like general appearance
What is almost always fatal once signs/symptoms appear and only has < 20 documented cases of human survival?
Rabies
What are signs/symptoms of rabies?
Early: may be asymptomatic, fever, HA, prickling/itching at bite site
Late: delirium, abnormal behavior, hallucinations, hydrophobia, insomnia
What is the treatment for rabies?
Supportive if signs/symptoms present & confirmed diagnosis
Post-bite prophylaxis w/rabies immune globulin & vaccination in pts bitten by an animal known or assumed to have rabies
What med is commonly used to prophylactically treat an animal bite?
Augmentin
How is typhus fever typically spread?
Body lice, chiggers, or fleas
What are common symptoms of typhus fever?
Fever
HA
Rash
How do you treat typhus fever?
Doxy (100mg BID for adults, 2.2mg/kg BID in kids) for at least 3 days after fever stops & evidence of improvement
Arboviral disease, West Nile virus, and yellow fever are all treated with what?
Supportive care
What is the 1st & 2nd most common STI in the US?
1st: chlamydia
2nd: gonorrhea
Both chlamydia and gonorrhea may have what type of symptoms?
Asymptomatic
Abdominal/pelvic pain
Dyspareunia
Dysuria
Urinary urgency
Penile/vaginal discharge
Breakthrough vaginal bleeding
Which STI (gonorrhea or chlamydia) has an unremarkable physical exam in 90% of men and 70-95% of women?
Chlamydia
Where do you obtain a sample for the nucleic acid amplification test when working a pt up for gonorrhea or chlamydia?
Sample must come from symptomatic area (urine, oropharyngeal, vaginal, rectal)
What is the treatment of choice for gonorrhea?
Ceftriaxone 500mg IM (if pt < 150kg) (100mg if pt > 150kg) x 1 dose