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. 2006 Sep;74(9):5003–5013. doi: 10.1128/IAI.00663-06

FIG. 4.

FIG. 4.

Invasion of (1 h) and intracellular presence in (4, 24, and 48 h) THP-1 macrophages infected with B. henselae Marseille (B.h. M), B. quintana Toulouse (B.q. T), and B. quintana Munich (B.q. M) (A) and with B. quintana JK-31 (Vomp+) (B.q. JK-31) and B. quintana 2-D70 (Vomp−) (B.q. 2-D70) (B). THP-1 cells were seeded in 24-well plates, differentiated with PMA, and infected at an MOI of 100. Invasion and intracellular presence were determined by gentamicin protection assays. An asterisk indicates that a value is significantly different from the value obtained for B. henselae Marseille (A) or B. quintana JK-31 (B) (P < 0.05).