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The disease is Lyme disease which some ticks can spread. Increased contact with ticks (hiking, camping, general human encroachment, climate change, etc) is increasing the incidence. Sometimes, people who recover from Lyme become red meat intolerant, or outrightly allergic. Interestingly, having giardiasis could also, in rare cases, cause this intolerance. Usually this sort of thing happens when something about the bug resembles something in the meat, so your body reacts to both the same way (this is termed molecular mimicry). The actual causes in these cases are unknown, so prevention is your best bet. Use repellents when in the wild, remove all deer ticks completely (learn how this is done before going camping in the woods), wear trousers rather than shorts, & look out for the characteristic "bull's eye" rash of Lyme.