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25 Cards in this Set
- Front
- Back
You are caring for a newborn infant of a mother who reports a history of syphilis but had uncertain treatment and no follow-up evaluation for her disease. Which of the following is most useful in determining whether the child has congenital syphilis?
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Venereal Disease Research Laboratory test (VDRL)
In the newborn, the VDRL may be positive either falsely or because of maternal infection and thus is not useful in screening the newborn. The FTA-ABS is a test specific for syphilis that would be positive in the infant with congenital syphilis and would not be affected by maternal infection unless the disease had been transmitted to the infant; however, there are no currently available recommended commercial tests for FTA-ABS IgM. Thus, in the infant, VDRL titers exceeding those of the mother, along with risk of infection based on the maternal history and findings, determine the need for further testing or treatment. Other findings that support a diagnosis of congenital syphilis include physical or x-ray findings of congenital syphilis, positive CSF VDRL, or elevated CSF cell count or protein. VDRL titers can be followed to determine response to therapy, and with successful therapy should decline. Blood or swab cultures are not helpful in diagnosing syphilis. Dark field microscopy is a useful test for diagnosing syphilis and must be prepared from active lesion |
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what heart problem is ass with syphilis
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aort regurg
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tx of syphilis
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all moms and infants with positive maternal serology without documented adequate tx with Penicillin
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what is common in tx by penicillin
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jarish herzheimer reaction
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if allergic to penicilline how to tx the syphilis
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give doxycycline
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what is the best initial test for syphilis
what is thmost accurate test |
VDRL
FTA-ABC or dark fieldmicroscopy |
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primary syphilis
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painless, but may be painful after bacterial infection
painless adenopathy |
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how does the chancre heal
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spontaneusly, even without tx
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secondary syphilis
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rash( palms and soles)
alopecia areata mucous patches condyloma lata |
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tertiary syphilis
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neurosyph--- meningo vascular ( stroke from vasculitis)
tabes dorsalis general paresis- memory and personality change aortitis ( aort regurge aortic aneurism) gummas- skin and bone lesion |
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false+ in syphilis
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infect
old age inject drug use and AIDS malaria endocarditis |
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when titers of VDRL are reliable
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at greater than 1:8
lower titers are most likely false+ high titers ( greater than 1;32) rarely are false+ |
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syphilis - tx
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primary and second:: single I/M penicillin
oral doxycycline if penicillin alerg tertiary syphil IV penicillin if allerg- desensitize to penicillin |
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when desensitization is answer in tx of syphilis
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neurosyphilis and pregnant
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yarisch herxheimer reaction
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fever and worse symt after tx
give aspirin and antypyretics |
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if dark firld is positive what to do
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tx, no more testing
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A 25-year-old man presents
with a single, indurated, painless ulcer on the penis that appeared two days ago. His most recent unprotected sexual contact was 21 days before. An immediate rapid plasma reagin (RPR) test is negative. . The most likely diagnosis is |
Syphilis
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what test can be negative in up to 30% of patients at an initial visit for primary syphilis.
2 when The probability of a negative test is increased |
Nontreponemal tests RPR, VDRL can be negative in up to 30% of patients at an initial visit for primary syphilis. 2 The probability of a negative test is increased if the patient presents early in the course of primary syphilis.
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what test is more sensitive and
is reactive around the time of appearance of the lesion |
The FTA-ABS, a treponemal test, is more sensitive and
is reactive around the time of appearance of the lesion |
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first choice to confirm a diagnosis of syphilis when a chancre
is present. |
The dark-field is the
investigation of first choice to confirm a diagnosis of syphilis when a chancre is present. |
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Both nontreponemal and treponemal tests will become reactive
within |
Both nontreponemal and treponemal tests will become reactive
within three weeks after the chancre has occurred |
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The incubation
period for syphilis is |
The incubation
period for syphilis is between 10 and 90 days, with an average of 21 days. |
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d/d
1 chancroid 2 Herpetic lesions 3 Donovanosis 4 Lymphogranuloma venereum |
1 The lesion typical of chancroid is a large and painful ulcer with undermined borders. Large inguinal adenopathy, often suppurative, is also
present. The incubation period is usually between 4 and 7 days 2 Herpetic lesions are shallow, painful, and multiple 3 Donovanosis is very rare in developed countries and is characterized by lesions that slowly enlarge, bleed easily on contact, and often have beefy-red granulomatous tissue 4 Lymphogranuloma venereum is also uncommon. It is primarily a disease of the lymphatic system. Patients often present with complaints related to inguinal adenopathy. The initial lesion, which is small, shallow, and painless, often goes unnoticed. |
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Which sexual partners should
be informed of the exposure and referred for evaluation? |
For primary syphilis, sexual partners from the
previous three months since the onset of symptoms should be assessed (6 months for secondary syphilis, and 12 months for early latent |
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treatment for
syphilis during pregnancy |
Penicillin is the only recommended treatment for
syphilis during pregnancy and should be given a least four weeks before delivery to be effective in treating the fetus. Regimens are the same as for nonpregnant women. In this case, it would be prudent to treat as a case of late latent syphilis (no symptoms consistent with secondary or primary syphilis, and unable to confirm if early, that is, less than one-year duration). Women who are allergic should be desensitized under observation and Epidemiology and Prevention of Communicable Diseases Answers 109 treated with penicillin. A Jarisch-Xerheimer reaction can occur when treating early syphilis. This may precipitate contractions after the second trimester, so women should be observed. Erythromycin has an unacceptable cure rate and is no longer recommended. Doxycycline is contraindicated during pregnancy. Adequate regimens of ceftriaxone have not been defined. |