90% of dogs infected with Lyme's never get ill, they carry the organism but it doesn't cause active infection
Quote:
http://www.veterinarypartner.com/Con...S=0&C=0&A=1588
Eradication of the Lyme spirochete is not a reasonable expectation with treatment; the organism is simply too good at hiding. The goal instead is to bring the patient into what is called a premunitive state. This is the state that 90% of infected dogs achieve when they get infected but never get ill: the organism is in their bodies latently but is not causing active infection.
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I suppose it is possible that when Streets colitis flares up, this may trigger a mild infection
plus Montreal is not that far from Vermont & New Hampshire where the Lyme's risk is stated by the CDC as moderate, someone from Mtl visiting the US could've brought back a tick on their vechicle/clothing/dog