Magnetotactic microorganisms can be found as unicellular prokaryotes, as cocci, vibrions, spirilla and rods, and as multicellular organisms. Multicellular magnetotactic prokaryotes are magnetotactic microorganisms composed by several magnetotactic bacteria organized almost in a spherical helix, and one of the most studied is Candidatus Magnetoglobus multicellularis. Several studies have shown that Ca. M. multicellularis displays forms of behavior not well explained by magnetotaxis. One of these is escape motility, also known as “ping-pong” motion. Studies done in the past associated the “ping-pong” motion to some magnetoreceptive behavior, but those studies were never replicated. In the present manuscript a characterization of escape motility trajectories of Ca. M. multicellularis was done for several magnetic fields, considering that this microorganism swims in cylindrical helical trajectories. It was observed that the escape motility can be separated into three phases: (I) when the microorganism jumps from the drop border, (II) where the microorganism moves almost perpendicular to the magnetic field and (III) when the microorganism returns to the drop border. The total time of the whole escape motility, the time spent in phase II and the displacement distance in phase I decreases when the magnetic field increases. Our results show that the escape motility has several characteristics that depend on the magnetic field and cannot be understood by magnetotaxis, with a magnetoreceptive mechanism being the best explanation.

趋磁微生物可以作为单细胞原核生物、作为球菌、弧菌、螺旋体和杆状体以及作为多细胞生物被发现。多趋磁原核生物是由球形螺旋几乎组织了几次趋磁细菌组成的趋磁微生物，并研究了最之一是暂定Magnetoglobus multicellularis。多项研究表明，Ca。M. multicellularis 表现出不能用趋磁性很好地解释的行为形式。其中之一是逃逸运动，也称为“乒乓”运动。过去进行的研究将“乒乓”运动与某些磁感受行为联系起来，但这些研究从未被复制。在本手稿中，描述了Ca的逃逸运动轨迹。考虑到这种微生物在圆柱形螺旋轨迹中游动，对多个磁场进行了多细胞分枝杆菌。据观察，逃逸运动可以分为三个阶段：（I）当微生物从液滴边界跳跃时，（II）微生物几乎垂直于磁场移动时以及（III）当微生物返回液滴时边境。当磁场增加时，整个逃逸运动的总时间、第二阶段花费的时间和第一阶段的位移距离减少。我们的结果表明逃逸运动具有几个依赖于磁场的特征，并且不能被趋磁性理解，磁感受机制是最好的解释。