This was sent to me today from a Lyme researcher:
Hello All,
I stumbled upon an interview with Willy Burgdorfer from the NIH archives. The quote below is about tick attachment times needed to transmit infection is from the bottom of page 55.
Studies done so far suggest that it takes about two days of attachment and feeding before spirochetes are being transmitted to a host animal. This is referred to as the "safety period," during which a person could remove a tick without becoming infected. I personally don't subscribe to this theory, because there are about 5 to 10 percent of infected ticks that have a generalized infection, including salivary glands and saliva at the time of attachment. In such cases, transmission of spirochetes would and does occur immediately at time of attachment.
There is much information at that link above.
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