External Faye’s test with rickettsiae have common mycobacterial antigens of amoebae OXl9, OX2, OXK for non-specific agglutination reaction, detection of rickettsiae antibodies in the patient’s serum. China’s common rickettsial disease on to be spotted de typhoid fever and scrub typhus, epidemic typhus mainly for OX19 agglutination price is elevated, scrub typhus is mainly manifested as OXK elevation obvious. Then, what are the methods of prevention for patients with negative Exophthalmos test? The following is the method of preventing Exophthalmos test negative: 1, control the source of infection Timely discovery of patients, early isolation, at the same time, the extermination of lice, the correct treatment; close contacts of medical observation for 14 days. 2, cut off the transmission way to prevent lice, lice is the key. Physical lice control can be done by steaming, boiling, washing, ironing, etc. The temperature should be kept above 85℃ for 30min; chemical lice control can be done by 10T powder, 0.5% 666 powder or 1% malathion, etc. It can be used to spread on the underwear or on the mattress. Head lice can be used in the Chinese medicine Baibu 30g, add 500ml of water, decoct for half an hour, take the filtrate and rub the root of the hair, then use a towel to wrap the head, and wash the hair with water the next day. If you can shave and burn the hairs of lice parasites, it is better. Strengthen publicity and education, keep the environment clean, and pay attention to personal hygiene. 3, artificial automatic immunization inactivated vaccine lice intestinal vaccine, chicken embryo or duck embryo vaccine, rat lung vaccine and so on three kinds. The commonly used vaccine in China is rat lung vaccine, which is used for residents of epidemic areas or newcomers to the infected areas. The inactivated vaccine cannot completely prevent the onset of typhus infection, but it can reduce the disease, shorten the duration of the disease, and reduce the mortality rate, but the immunization procedure is more cumbersome. The attenuated E strain vaccine has been applied in some countries, and the immunization effect of one subcutaneous injection can last for 5 years. In recent years, there are Golinevich chemical vaccine injection 1 injection can be abroad.