Table 1: Diagnostic criteria of Raoult et al. in the study patients.

PointsPatient characteristics N (%)Patients evaluated

Epidemiological criteria
Stay in endemic area2171 (100)171
Occurrence between May and September2165 (96.5)171
Contact with dog ticks2114 (79.2)144
Clinical criteria
Fever > 39°C5170 (99.4)171
Eschar5115 (67.3)171
Maculopapular or purpuric rash5168 (98.2)171
Two of the three clinical criteria376 (44.4)171
All three clinical criteria present595 (55.6)171
Nonspecific laboratory findings
Platelets < 150,000/mm3181 (50.9)159
ALT or AST > 50 u/L1124 (78.5)158
Serological criteria
Sole serum sample IgG ≥ 1 : 1601092 (62.6)147
Fourfold increase in paired serum samples2031 (21.1)147