Bureau of Epidemiology
Bureau of Epidemiology September 1998 Utah Department of Health
Congenital Syphilis 
Treatment for Syphilis in Adults
Bat Tips
Quarterly Report
Monthly Morbidity Summary

Congenital Syphilis

It has been many years since a case of congenital syphilis has been reported in Utah. Unfortunately, in the past several months, we have had two presumptive cases reported. The first case involved a mother who received prenatal care late in pregnancy. A routine screening test revealed that she had an untreated case of syphilis and she received adequate treatment during her ninth month of pregnancy. The infant was asymptomatic at the time of delivery and received presumptive treatment for congenital syphilis based upon the fact that the mother was treated for syphilis less than a month before delivery.

The most recent case involved a woman who sought prenatal care well into her seventh month of pregnancy. A serological test for syphilis was not performed prior to delivery. Following delivery, the mother’s primary care physician became aware of the oversight and ordered a full prenatal panel. At that time it was determined that she was infected with syphilis. Around the same time, the baby exhibited symptoms that were compatible with syphilis (although viral meningitis could not be ruled out). In light of the mother’s status and symptoms that were compatible with congenital syphilis, the infant was treated with penicillin for ten days. The mother also received treatment for latent syphilis of unknown duration.

"No infant should leave the hospital without the maternal serologic
status having been determined for syphilis."

In the past, syphilis accounted for nearly one-third of stillbirths. Many of these mothers had inadequate prenatal care and thus went undiagnosed. Today, syphilis has a much smaller role in fetal death.

Spirochetes readily cross the placenta and can result in congenital infection. The frequency of congenital syphilis varies with both the stage and duration of maternal infection. Although any stage of maternal syphilis may result in fetal infection the highest incidence occurs in neonates born to mothers with early syphilis and the lowest incidence occurs in neonates born to mothers with late latent syphilis.

Testing for syphilis in a pregnant woman is required by law (Utah Code Annotated. 26-6-20). Effective prevention and detection of congenital syphilis depends on the identification of syphilis as early as possible during pregnancy. Therefore, a serologic screening test such as the VDRL or RPR should be performed at the first prenatal visit. Because the VDRL and RPR lack specificity, treponemal tests such as the FTA-ABS or MHA-TP should be used to confirm a positive result. For women at high risk, a second nontreponemal test should be performed during the third trimester. No infant should leave the hospital without the maternal serologic status having been determined for syphilis.

As part of the management of pregnant women who have syphilis, information concerning treatment of their sex partners should also be obtained.

There are no proven alternatives to penicillin during pregnancy, thus a regimen using penicillin remains the treatment of choice. Erythromycin may be curative in the mother, but may not prevent congenital syphilis. Pregnant patients who are allergic to penicillin should be desensitized and treated with penicillin.

Infants with suspected or proven congenital syphilis should have a cerebrospinal fluid examination prior to treatment and should be followed at monthly intervals until nontreponemal serologic tests become negative or serofast.




Benzathine penicillin G 2.4 m.u/ IM in a single dose
Doxycycline 100mg orally twice a day for 2 weeks
Tetracycline 500mg four times a day for 2 weeks



Benzathine penicillin G 7.2 m.u./IM administered as three doses of 2.4 m.u./IM each at one week intervals
Doxycycline 100mg orally twice a day for 4 weeks
Tetracycline 500mg four times a day for 4 weeks



Aqueous crystalline penicillin G 100,000-150,000 units/kg/day, administered as 50,000 units/kg/ dose IV every 12 hours during the first 7 days of life, and every 8 hours thereafter for a total of 10 days
Procaine penicillin G 50,000 units/kg/dose IM a day in a single dose for 10 days


Infants should be treated for presumptive congenital syphilis if they were born to mothers who meet the following criteria:

had untreated syphilis at delivery;

had serologic evidence of relapse or reinfection after treatment;

was treated with erythromycin or other nonpenicillin regimen for syphilis during pregnancy;

was treated for syphilis less than one month before delivery;

did not have a well documented history of treatment for syphilis;

was treated for early syphilis during pregnancy with the appropriate penicillin regimen, but nontreponemal antibody titers did not decrease at least fourfold;

was treated appropriately before pregnancy but had insufficient serologic follow-up to ensure an adequate treatment response and lack of current infection.


The 1998 Guidelines for Treatment of Sexually Transmitted Diseases are available.

Bat Tips (Adapted from Utah State University Extension’s Wildlife Management Series, "Bats")

Bats are an important part of Utah’s ecosystems, and they are directly beneficial to humans as they consume 30-100% of their weight in insects each night! However, direct human-bat encounters are dangerous because bats can transmit rabies. Rabies is rare in bats (it occurs in less than 1% of bats), but is fatal to humans. Although uncommon in Utah, bats can also transmit a fungal disease called histoplasmosis.

Bats are shy animals and normally avoid contact with humans. A bat that is active during the day or moving so slowly that it can be caught is likely to be sick and should be avoided. Unwanted human-bat encounters also occur when bats get into houses or other buildings. Bats do not chew holes in buildings but can enter through existing openings that are as small as 1/4 inch (5 millimeters)! Bats can also enter through open doors and windows, loose or torn screens, or gaps around attic doors.

What to do if a bat is found inside a building:

1. If the bat has bitten someone, OR if you find the bat in a room with someone who is unable to give a reliable history of whether they have had contact with the bat or not (i.e., a young child or mentally challenged adult, a sleeping person, or someone under the influence of drugs or alcohol), you need to make every attempt to safely capture the bat alive using the container technique described below (2b). The captured bat should then be tested for rabies.

2. If you are certain that the bat has had no contact with anyone in the building:

     a. If it is flying around, you can open an outside door or window and wait for the bat to exit.

     b. If it lands, you can place a jar or other container over the bat, slide a piece of heavy cardboard under the mouth of the            container, and trap the bat inside. The bat can then be released outside away from children and pets.

The best way to keep bats from entering buildings is to locate and seal any openings the bats could be using. The fall is the best time to ‘bat-proof’ a building as this is the time of year when most bats vacate their nests (so you don’t run the risk of trapping young flightless bats which will die without food and create a subsequent odor problem). A variety of materials, such as caulk, foam rubber, or steel wool can be used to fill in small holes, and materials such as metal screening or tar paper can be used to cover over larger holes.

Remember, all bats are protected under Utah law and it is illegal to intentionally kill a bat. Bat-proofing of buildings and other prudent human behavior can prevent some (but not all, unfortunately) unwanted human-bat encounters.

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Quarterly Report of Diseases of Low Frequency
Year-to-Date January 1 - September 30, 1998
(including a comparison for same time period 1994 -1997)

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Utah Department of Health, Bureau of Epidemiology

Monthly Morbidity Summary - September 1998 - Provisional Data

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The Epidemiology Newsletter is published monthly by the Utah Department of Health, Division of Epidemiology and Laboratory Services, Bureau of Epidemiology, to disseminate epidemiologic information to the health care professional and the general public.

Send comments to:

The Bureau of Epidemiology
Box 142104
Salt Lake City, UT 84114-2104
or call (801) 538-6191

Approval 8000008:
Appropriation 3705

Rod Betit, Executive Director Utah Department of Health
Charles Brokopp, Dr.P.H. Division of Epidemiology and Laboratory Services
Craig R Nichols, MPA, Editor, State Epidemiologist, Director Bureau of Epidemiology
Cristie Chesler, BA Managing Editor