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Ich nehme alles zurück, war eine Falschinformation!

Clinicians should promptly offer antibiotic prophylaxis for
known Ixodes tick bites in which there is evidence of tick feed-
ing, regardless of the degree of tick engorgement or the infec-
tion rate in the local tick population. The preferred regimen is
100–200 mg of doxycycline, twice daily for 20 days. Other
treatment options may be appropriate on an individualized
basis (Recommendation, very low-quality evidence).

Role of patient preferences

Moderate: Most patients will place a high value on preventing
chronic illness. However, some patients will value avoiding
unnecessary antibiotics and prefer to not treat a tick bite pro-
phylactically. Hence, treatment risks, benefits and options
should be discussed with the patient in the context of shared
medical decision-making.

Also doch zwanzig Tage prophylaktisch was nehmen...würde ich mir auch gut überlegen.