Great info posted above... I too would be very concerned about vaccinating a pregnant woman... Below is part of an article concerning transmission of disease. It is much longer than the part I post, so you could do a search and find the entire article I believe. (I have it in PDF format, for anyone interested.)
ZOONOSES: HOW REAL THE THREAT?
Richard B. Ford, DVM, MS, DACVIM and DACVPM
College of Veterinary Medicine
North Carolina State University, Raleigh, NC
(snipped from mid-article)
“Although dogs appear to inflict more bite wounds than cats, the likelihood of infection developing subsequent to a bite wound is greater in cats than in dogs. Wound infection is most common in those victims who are more than 50 years of age, when wounds are not properly nor adequately cleansed, when there is more than a 24 hour delay in seeking treatment, and when wounds occur on the hands.
While an animal bite to a human is not, per se, a zoonotic disease, the potential for significant injury or infection does exist. Recently, renewed concern has developed over the ability of the dog to cause severe, even fatal, sepsis in humans following the inoculation of resident oral bacteria via bite into human tissue. It is interesting to note that, although infections from dog bites are a major concern, cat bites and human bites are much more likely to become infected. The likelihood of infection following a dog bite is only 3 to 5% (gram negative, aerobes) while infection rates following human or cat bites can be as high as 50% (esp. Pasteurella multocida).
The DF-2 organism, now recognized as Capnocytophaga canimorsus, has surfaced as one of the resident organisms in dog saliva that, following bite-wound contamination, can cause sepsis in humans leading to severe morbidity or death. At particular risk are individuals who have experience splenectomy or are otherwise immune compromised. This group of gram-negative rods has a propensity to cause disseminated intravascular coagulation (DIC) and symmetric peripheral gangrene in asplenic patients. True incidence of bacteremia after dog bite is considered to be underestimated. Penicillin is the treatment of choice in affected patients. “