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Case 3-6
Blood & Lymphatics
46
Medical
Graduate
02/14/2011

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Term
Nuchal Rigidity
Definition
resistance of forward bending that hints at meningitis (do a lumbar puncture to rule out)
Term
Pleocytosis
Definition
elevated cell numbers
Term
Morulae
Definition
intraleukocyte vacuoles, tiny inclusions that are darkened inside of the cytoplasm of cells and can be due to diff things, in this group of diseases (HMA) means something imp.
Term
Why do we see low cell count with RBC when we're addressing diseases in the WBC?
Definition
Depression of the marrow to some extent (erytropoesis impaired due to many infx) probably on bases of immune response. Very non-specific finding.
Term
Do 100% of patients with HME have morulae involvement?
Definition
No
Term
Target cells for HEE?
Definition
Neutrophils
Term
What part of country do we expect to see HME? and HGA?
Definition
SE, SCentral...NE and North by NorthWest
Term
Ixodus Ticks vector for...
A. Americanum vector for...
Definition
HGA (same vector for babesiosis)
HME (lone-star tick)
Term
Morulae seen within the cytoplasm of neutropils is indicative of infx within ehrlichia chaffeensis
Definition
FALSE
Term
Anaplasma phagocytophilum enters blood monocytes and macrophages through receptor-mediated endocytosis, then localize and multiply exclusively within endosomes that avoid phago-lysosomal pathways.
Definition
FALSE
Term
If suspicion if very high for HME or HGA (with the symptoms) do you wait for more conclusive testing to determine and then to treat?
Definition
No, treat with doxycycline, rifampin if preggers. See clinical improvement as soon as 24 hrs. after administration of doxycylcine.
Term
If patient doesn't respond fully (for HME and HGA with doxycycline), think about?
Definition
You might not have ALL of the diagnoses (may be co-infected with another tick-borne illness)
Term
Expect to find with Group B Strep...
Definition
Sore Throat, exudate on tonsils, No palpable spleen, No atypical lymphocytes & confirm it's not Group B Strep, perform a throat swab and culture it/rapid strep test
Term
CMV expect to find...
Definition
age would be different (all age groups) risk factor: immunocompromised patient, day care (environment)...those highly at risk are 2 y/o or less, presentation would be diff in that there would be aminotransferases higher in CMV...EBV present more as a localized disease. Less exaggerated lymphadenopathy and spleenomegaly,
Term
Make diagnosis of CMV
Definition
make diagnosis via surface Ag (p65 in peripheral neutrophils) Other way is: rapid (12-24 hr) and it is a culture used when organs are involved esp with immunocompromised patients.
Term
Common symptoms of EBV mononucleosis
Definition
Fever, sore throat, malaise,
Term
Pathogenesis of EBV
Definition
Enter via saliva, affect epithelial cells and then memory B cells are the reservoir.
Term
What cell causes the diffuse infix of EBV and cause lymphadenopathy?
Definition
T Cells
Term
What do you find in labs for mono?
Definition
atypical lymphocytes in CBC, loss of basophilic cytoplasm and the nucleus elongated etc..
Term
If do monospot test in first 2 week so infix with EBV do you expect it to be (+) for heterophile Ab?
Definition
No b.c within the early disease the person has not yet had the time to produce the Ab, so it will be (-) and then after 2 wks, should be (+)
Term
VCA
Definition
Viral Capsular Ag (produces IgM on outside)
Term
NA-1 IgG
Definition
Nuclear Ag (-) with acute and (+) with past infxn
Term
(+) IgG EBNA and IgG VCA, absence of IgM VCA, and heterophile Ab (-)
Definition
Past Infx of EBV
Term
Group B Strep
Definition
Group A beta-hemolytic strep
Term
If give EBV patients receive PCN what happens?
Definition
They break out in a characteristic rash due to immunity, not to hypersensitivity.
Term
Pathogenesis of HIV?
Definition
-Infects mucosal surfaces that have the most DC (oral, anal, vagina)
-HIV lifecycle: envelope prtns GP120 and GP41, as well as gag protons, both can be used clinically (pol proton not used clinically).
1. Attachment
2. Uncoating
3. RTranscription (NRTI's or NNRTI's slow or stop RT from reading RNA Code)
4. Integration
5. Proviral transcription
6. Translation
7. Cleavage
8. Assembly, maturation, and release from the CD4 cells
Term
T Tropic:
M Tropic:
Dual Tropic:
.
Definition
T:affects T cells over MP
M:affects MP over T Cell
Dual:affect both


**Diff b.w is the receptor used, CCR5 (MP) and CxCR4 (Tcell) IMP to know for what therapy to give, which receptor to target.
Term
With acute HIV infix the HIV ELISA will be?
Definition
Negative, HIV Ab detection test...takes time for people to make the Ab
Term
HIV ELISA can be used to diagnose acute retroviral syndrome? T/F
Definition
FALSE b.c acute!! Ab must take time to be made
Term
If HIV ELISA is neg will western blot also be negative?
Definition
yes
Term
What can you use to diagnose HIV if ELISA is (-) during acute phase infection.
Definition
HIV RNA PCR (become + before ELISA) or immunofloresence assay
Term
Which conditions do you get a false neg? with (Ab test)
Definition
Acute infection, already immunocompromised, start medication after HIV RNA PCR and then can't make Ab in response
Term
What do you order to confirm ELISA? What does it measure?
Definition
Western Blot, measuring the surface envelope protiens (Gp 120 and 41)
Term
ELISA detects
Definition
HIV 1 or 2, both
Term
Western only detects
Definition
EITHER HIV-1 or 2
Term
Acute infection timeline:
Definition
HIV RNA detectable in 10 days, reach highest level around 20-21 days, Ab becomes detectable around 25 days... Acute is anywhere from 2-4 wks after infection-where we might not get ELISA test (+)
Term
Normal CD4 count
Definition
800-100 cells/ul
Term
After a few weeks of HIV infection...
Definition
CD4 count goes down and the viral RNA peaks!
Term
CD4 count has to be < _____ is considered AIDS
Definition
200 cells/ul
Term
SPecial Test:
HLA-B*5701 Screening
Definition
Recommended before starting Abacavir, to reduce risk of hypersensitivity rxn (HSR). HLA-B*570 positive patients should be recorded as allergic to ABC.
Term
Special Test:
CCR5 tropism assay
Definition
should be performed when a CCR 5 antagonist ... FINISH OFF PPT
Term
Start ART with..
Definition
-history of AIDS-defining illness
FINSH from ppT
Term
6 classes of ARV medications
Definition
-NRTI (backbone, have 2 from here in combo with the others)
-NNRTI
-PI
-Integrase Inhibitor (II)
-Fusion Inhibitor
-CCR5 Antagonist
Term
Side Effects of NRTI
Definition
-Bone Marrow suppression: anemia, leucopenia
-Peripheral neuropathy
-Pancreatitis
-Abacavir (HSR)
Term
SE of NNRTI
Definition
-Drug-Drug interaction
-severe skin rash
-hepatitis
-rapid resistance if dose missed
Term
Se of PI
Definition
-Paresthesias
-Diarrhea, Nausea, Vomiting
FINISH from PPT
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