In an interview on March 10, 2017, on CBC radio (Ottawa Morning), Dr. Caroline Quach, the president of Association of Medical Microbiology and Infectious Diseases - AMMI - was interviewed.
The entire radio interview can be found here. http://www.cbc.ca/player/play/894819395658
Here is her response when asked about mother to child transmission.
Question/Interviewer: Can Lyme Disease be transmitted in the womb, for example?” - starting at 7:48 into the interview.
Dr Quach answer: “Well then again, there’s no evidence that that is actually happening. And in fact even in animal models, in mice that were infected with Lyme disease did not transmit it to their offspring. So there’s no animal models to support it and hasn’t been any evidence in the, in humans that that has happened, at least not reported in the literature. I think that as for everything we have peer review journals that review articles from scientists and so as long as that data is not available to the medical literature, to us at least there’s no proof that it actually happens, so neither from breast milk or through sexual contact or through mosquito bites."
This is a portion of a written response from the Canadian Lyme Science Alliance:
'4. Congenital transmission:
There are certainly case reports of congenital infection of Borrelia and related tick vectored diseases in humans. (7-9) These tend to be older and the power of more recent epidemiological studies in humans was insufficient to resolve this issue.(10-12) Moreover, most human studies have focused on the potential of Borreliosis to cause adverse pregnancy outcomes, and did not focus on the long-term health of the child.(33) In animal models, Gustafson et al. 1993 (13) did find congenital transmission in dogs and Burgess et al (1993) in wild mice (14). While it is correct that Silver et al (1995) (15) showed that infected mice did not pass the infection to their pups it is also important to note that they did report significant mortality of the pups of infected mothers. These findings are of obvious concern to pregnant mothers and deserves to be better assessed.'
The full report which addresses the entire interview and all references can be found here: