Sexual Assaults and PEP

There is a protocol that can be obtained from Lynda Bell in clinic regarding the care of survivors of sexual assaults. We will sometimes be called to weigh in on HIV PEP alone, as they have a protocol they follow for everything else. However, if you are ever called about what should be done, particularly if a SANE nurse is not available, here are some basics from the protocol.

Baseline laboratory tests should include:

• HIV Antibody testing
• CBC with differential
• LFTs
• BUN/Creatinine
• STD Screen (gonorrhea, chlamydia, syphilis)
• Hepatitis B serology
• Hepatitis C serology
• Pregnancy test

Prophylaxis against the most frequently diagnosed STDs among sexually assaulted women should be administered:

• Ceftriaxone 125mg IM in a single dose [Gonorrhea]
• Metronidazole 2gms orally in a single dose [BV, Trichomoniasis]
• Azithromycin 1gm orally in a single dose OR Doxycycline 100mg orally twice daily for seven days [Chlamydia]

HIV post-exposure prophylaxis is offered within 72 hours of the assault. If the perpetrator's HIV medical history is unknown, the two preferred regimens are:

• NNRTI-based: Efavirenz plus (Lamivudine or Emtricitabine) plus (Zidovudine or Tenofovir)...usually as Sustiva plus Combivir, or Sustiva plus Truvada.
• PI-based: Lopinavir/Ritonavir (Kaletra), plus Zidovudine or Tenofovir...usually as Kaletra plus Combivir, or Kaletra plus Truvada.

I've been advised typically to use the PI-based regimen unless there is another reason they should be avoided. Keep in mind that if the source patient (in the case of needlesticks) is one of OUR HIV clinic patients, we have access to their genotype and med history, and can formulate an appropriate PEP for the victim based on this information (i.e. you wouldn't want to start someone on PEP that their virus would be resistant to).

All sexual assault cases should follow up with a mid-level provider in the ID Clinic, regardless of whether or not they accept PEP. We usually just send a phone message to Lynda Bell with the patient's general information, and she contacts them to set up a follow up within 48 hours or so.

Risk Assessment

Sometimes, you are asked to comment on the risk, given different exposures (assault, blood splashes in the eye, needlestick, etc.). The risk for HIV acquisition per various acts can be found in the MMWR, January 21, 2005). It is also estimated in the Sanford Guide for the treatment of HIV.

Vaccinations in PEP

Hepatitis B: Patients who are unvaccinated prior to the assault should receive the initial Hep B vaccine, and follow up to complete the series. Unless the offender is known to have Acute Hep B, HBIG is not required. Remember, all patients should have serologies drawn.

Tetanus: If the patient has skin abrasions or other wounds and immunization status is greater than 5 years, give Tetanus Toxoid 0.5ml IM. If the patient has never been immunized, also give Hyper-Tetanus 250mcg IM.

Yvonne Carter, MD