Congenital syphilis laboratory findings: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
|||
| Line 5: | Line 5: | ||
{{Congenital syphilis}} | {{Congenital syphilis}} | ||
==Overview== | |||
Diagnosis of congenital syphilis can be done prenatally and after birth. The investigations include serological tests, PCR of the amniotic fluid, long bone radiographs, ultrasound and CSF analysis. PCR of the amniotic fluid and ultrasound are commonly preferred diagnostic modalities in the prenatal period. Long bone radiographs along with serological tests and CSF analysis are preferred after birth. | |||
== Laboratory Findings == | == Laboratory Findings == | ||
====Prenatal Diagnosis==== | ====Prenatal Diagnosis==== | ||
Revision as of 18:31, 15 February 2017
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Kalsang Dolma, M.B.B.S.[2]; Aditya Govindavarjhulla, M.B.B.S. [3]
|
Congenital syphilis Microchapters |
|
Diagnosis |
|
Treatment |
|
Case Studies |
|
Congenital syphilis laboratory findings On the Web |
|
American Roentgen Ray Society Images of Congenital syphilis laboratory findings |
|
Risk calculators and risk factors for Congenital syphilis laboratory findings |
Overview
Diagnosis of congenital syphilis can be done prenatally and after birth. The investigations include serological tests, PCR of the amniotic fluid, long bone radiographs, ultrasound and CSF analysis. PCR of the amniotic fluid and ultrasound are commonly preferred diagnostic modalities in the prenatal period. Long bone radiographs along with serological tests and CSF analysis are preferred after birth.
Laboratory Findings
Prenatal Diagnosis
- Detection of IgM antibodies aganist T.pallidum in the blood collected by chordocentesis.[1][2]
- PCR of the amniotic fluid to detect T. pallidum DNA.[3]
- Antenatal ultrasound is commonly done and the findings suggestive of congenital syphilis include: hydrops fetalis characterised by scalp oedema, placental thickening, serous cavity effusion, and polyhydramnios. Other additional findings inlcude hepatosplenomegaly, placentomegaly, non-continuous gastrointestinal obstruction and dilatation of the small bowel.[4][5][6]
Postnatal Diagnosis
- Examination of the placenta or umbilical cord using a silver stain demonstrates spirochetes or a T. pallidum PCR test can be done.
- The use of serological tests to identify the infection in infants less than 15 months of age born to infected mothers is not performed as passive transfer of IgG antibodies to the fetus occurs during the pregnancy.
- Other laboratory findings in the new born include:[7]
- Elevated liver enzymes
- Leucocytosis
- Coombs negative hemolytic anaemia
- Thrombocytopenia
- Hypoalbuminemia
- Hyperbilirubinemia
Imaging Studies
X-Ray
- Skeletal survey in a still born, typical osseous lesions are demonstrated in congenital syphilis.
Long Bone Radiographs
- Radiographs typically demonstrate bilateral, symmetric, and polyostotic lesions in femur, humerus, and tibia.[8][9]
- Common findings on radiographs include:
- Metaphyseal lucent bands
- Symmetric localized demineralization and osseous destruction of proximal tibial metaphysis
- Metaphyseal serration
Ultrasound
Antenatal sonographic features include:[10][11]
- Fetal hepatosplenomegaly
- Placentomegaly
- Fetal ascites
In severe cases findings include:
- Fetal hydrops
- Bent fetal long bones
Doppler Studies
Doppler ultrasound of the uterine and umbilical arteries show increase in the mean systolic to diastolic ratios in mothers infected with syphilis indicating an increased resistance to perfusion of the placenta secondary to vasculitis, placental villitis and obliterative arteritis caused by syphilis.[12]
Other Diagnostic Studies
CSF Analysis
Indications : Lumbar puncture is indicated in the following situations.[13]
- If the infant or child has signs and symptoms of congenital Syphilis.
- If there is no documentation of treatment for maternal infection during the period of gestation.
- If the mother was treated within 4 weeks of delivery.
- If the mother was inadequately treated or documentation of the treatment is incomplete.
- A four-fold decline in titer following therapy in the mother is not documented.
CSF Findings:
- Reactive CSF VDRL. [14]
- CSF pleocytosis(>25 white blood cells [WBC]/microL for infants <1 month)
- Elevated CSF protein (>150 mg/dL in term infants <1 month of age and >170 mg/dL in preterm infants <1 month of age)
References
- ↑ Wendel GD, Sánchez PJ, Peters MT, Harstad TW, Potter LL, Norgard MV (1991). "Identification of Treponema pallidum in amniotic fluid and fetal blood from pregnancies complicated by congenital syphilis". Obstet Gynecol. 78 (5 Pt 2): 890–5. PMID 1923218.
- ↑ Park JY, Han GH, Kwon DY, Hong HR, Seol HJ (2015). "Prenatal diagnosis of congenital syphilis presenting with transient pleural effusion in the fetus: a case report and rising incidence of congenital syphilis in South Korea". Clin Exp Obstet Gynecol. 42 (6): 822–4. PMID 26753496.
- ↑ Muller, M; Ewert, I; Hansmann, F; Tiemann, C; Hagedorn, H J; Solbach, W; Roider, J; Nolle, B; Laqua, H; Hoerauf, H (2006). "Detection of Treponema pallidum in the vitreous by PCR". British Journal of Ophthalmology. 91 (5): 592–595. doi:10.1136/bjo.2006.110288. ISSN 0007-1161.
- ↑ Levine Z, Sherer DM, Jacobs A, Rotenberg O (1998). "Nonimmune hydrops fetalis due to congenital syphilis associated with negative intrapartum maternal serology screening". Am J Perinatol. 15 (4): 233–6. doi:10.1055/s-2007-993933. PMID 9565220.
- ↑ Russell, Peter (1974). "Placental Abnormalities of Congenital Syphilis". American Journal of Diseases of Children. 128 (2): 160. doi:10.1001/archpedi.1974.02110270034007. ISSN 0002-922X.
- ↑ Riley BS, Oppenheimer-Marks N, Radolf JD, Norgard MV (1994). "Virulent Treponema pallidum promotes adhesion of leukocytes to human vascular endothelial cells". Infect. Immun. 62 (10): 4622–5. PMC 303152. PMID 7927729.
- ↑ Hollier LM, Harstad TW, Sanchez PJ, Twickler DM, Wendel GD (2001). "Fetal syphilis: clinical and laboratory characteristics". Obstet Gynecol. 97 (6): 947–53. PMID 11384701.
- ↑ Rasool MN, Govender S (1989). "The skeletal manifestations of congenital syphilis. A review of 197 cases". J Bone Joint Surg Br. 71 (5): 752–5. PMID 2584243.
- ↑ Kocher MS, Caniza M (1996). "Parrot pseudoparalysis of the upper extremities. A case report". J Bone Joint Surg Am. 78 (2): 284–7. PMID 8609122.
- ↑ https://radiopaedia.org/articles/in-utero-syphilis-infection. Accessed on September 28th, 2016.
- ↑ Reyna-Figueroa J, Esparza-Aguilar M, Hernández-Hernández Ldel C, Fernández-Canton S, Richardson-Lopez Collada VL (2011). "Congenital syphilis, a reemergent disease in Mexico: its epidemiology during the last 2 decades". Sex Transm Dis. 38 (9): 798–801. doi:10.1097/OLQ.0b013e31821898ca. PMID 21844732.
- ↑ Genc, M. (2000). "Syphilis in pregnancy". Sexually Transmitted Infections. 76 (2): 73–79. doi:10.1136/sti.76.2.73. ISSN 1368-4973.
- ↑ Phiske, MeghanaMadhukar (2014). "Current trends in congenital syphilis". Indian Journal of Sexually Transmitted Diseases and AIDS. 35 (1): 12. doi:10.4103/0253-7184.132404. ISSN 0253-7184.
- ↑ Workowski KA, Bolan GA, Centers for Disease Control and Prevention (2015). "Sexually transmitted diseases treatment guidelines, 2015". MMWR Recomm Rep. 64 (RR-03): 1–137. PMID 26042815.