Lyme Disease Flashcards
Lyme disease is endemic in what countries
North America and Europe
Lyme disease is transmitted by ticks of the genus ___
Ixodes
Larvae hatched from eggs 1st become infected with B. Burgdorferi by
Feeding on a natural reservoir for spirochetes
MC reservoir for spirochetes
Small rodents, e.g. Mice and voles
MC vectors for human Lyme disease
Ixodes nymphs
Humans are at risk of becoming infected with B. burgdorferi when they enter tick habitats such as
Forests, shaded valleys, gardens, lawns, inner-city parks
Preferred feeding location of ticks
1) Popliteal region
2) Thighs
3) Groin
4) Breasts
5) Axillae
6) Neck
7) Head
T/F Ixodes tick bite is often painful
F, often goes unnoticed because it is typically painless
MC organ systems affected by Lyme disease
1) MSK
2) Cutaneous
3) Neurologic
4) Cardiac
Early skin lesions in Lyme disease
1) Erythema migrans
2) Borrelial lymphocytoma
T/F The risk of developing Lyme disease after a tick bite is high
F, low, even if the tick is infected with B. burgdorferi
Late skin manifestations of Lyme disease
Acrodermatitis chronica atrophicans
Early neurologic manifestations of Lyme disease
1) CN palsy
2) Lymphocytic meningitis
Late neurologic manifestation of Lyme disease
Chronic encephalomyelitis
Early MSK manifestation of Lyme disease
Arthralgia
Late MSK manifestation of Lyme disease
Arthritis
T/F Cardiac manifestation of Lyme disease occurs late in the disease
F, early
Early manifestations of Lyme disease become evident when
Within days to weeks after tick bite
Late manifestations of Lyme disease become evident when
Months after tick bite
T/F Early manifestations of Lyme disease are self-limiting
T
T/F Late manifestations of Lyme disease rarely lead to irreversible damage of involved organs
T
T/F In most patients with Lyme disease, only 1 organ system is affected
T
Earliest sign of Lyme disease
Erythema migrans
