He responded well to 6 weeks of oral antibiotic treatment. Lyme borreliosis infection almost knows no limits. It is known to be transmitted by the black-legged tick, also known as the deer tick. But it is so tiny it can easily be mistaken for a fleck of sand or a mole. An engorged female adult tick can be as large as a kernel of corn, similar to an engorged dog tick.
Dog ticks have a horseshoe pattern on their backs.
The ticks feed for about two days, after which they un-cement themselves and mature to the next stage of life. They have a two year lifecycle. It may not be well recognized where you live, but it is possible to get the infection anywhere in the world the ticks may be found. The tick carrying the infection is so tiny and easily spread by birds, mice, pets, etc. If you have the rash, take photos if at all possible.