More than 600,000 bacilloscopies were carried out for the timely diagnosis and detection of new cases. Epidemiological studies were also made on 95 per cent of patients' contacts in order to avoid possible contagion.
571. 为及时诊断发现新病例，共进行了600 000次细菌观察，对95%的患者接触者进行了流行病学调查，以便预防可能的传染。