Although this postulated mechanism cannot be discarded (including in the São Paulo metropolitan area), the current literature has considered that an attached tick needs several to many hours of attachment for a successful inoculation of rickettsiae into human skin.
After 24 hours of attachment, cells were treated with CTet for 4, 8, 12, and 24 hours.
In a study in Streptococcus mutans, the relative rate of synthesis of at least 25 different proteins was enhanced within 2 hours of attachment to a glass surface.
The infection can apparently be transmitted within several hours of attachment because the patient was certain of the maximum interval that the tick could have been attached to a visible region of his leg.
We have reported that the detachment strength was significantly increased (40 × 10−7 Nt s) within the first hour of cell attachment, where the highest rate of cell spreading was noted (2200 μm).
Semi-confluent Caco-2 enterocyte-like human cells were infected (m.o.i. of 20) with the differently pretreated bacteria for 2 hours (1 hour attachment time in the dark without antibiotic, washing step, followed by one hour incubation with gentamicin).
After 24 hours of cell attachment, plates were washed with 100 µL/well PBS, and the cells were treated with 0, 0.1, and 0.5 Gy ITCM for 24 hours.
The typical expectation that transmission of tickborne bacteria to humans as well as to dogs requires ≥2 hours of tick attachment may discourage persons from immediately removing them and result in transmission of this lethal bacterium.
However, its inability to prevent cell-surface attachment within one hour of incubation in the microtiter attachment assay implied a possible delayed in its antibacterial action.
Alternatively, accumulation of the tomato XTH (xyloglucan endotransglucosylase/hydrolase LeXTH1) protein 6 hours after attachment of the parasite has provided evidence for a role of XTH in defence reactions associated with the incompatible tomato- Cuscuta interaction as was presented in Albert et al. [ 54].
