医生在显微镜下发现了分枝杆菌。

The doctor identified ___mycobacteria under the microscope.

实验室检测显示，痰液样本中存在抗酸染色的分枝杆菌。

The lab test showed ___mycobacteria with acid-fast staining in the sputum sample.

艾滋病患者容易感染分枝杆菌，因为他们的免疫系统较弱。

People with AIDS are susceptible to ___mycobacteria infections due to their weakened immune systems.