A pathogen causes

Primary infection is that the first time that the host plants are exposed to and infected by a pathogen?

Secondary infection also refers to the second time a host becomes infected with the same pathogen?

The basic features of infectious disease are A: There are infectivity, pathogen, epidemic, immunity. B: There are infectivity, patients, immunity, epidemic. C: There are source of infection, route of transmission, susceptibility, immunity. D: There are infectivity, epidemic, endemic, relapse. E: There are pathogen, reinfection, epidemic, immunity.

Primary infection is that the first time that the host plants are exposed to and infected by a pathogen? A: 正确 B: 错误

Secondary infection also refers to the second time a host becomes infected with the same pathogen? A: 正确 B: 错误

Which of the pathogen cause sleeping sickness? A: Trypanosoma brucei B: Trypanosoma cruzi C: Mycobacterium tuberculosis D: Escherichia coli

The most<br/>common pathogen of acute hematogenous osteomyelitis is () A: mould B: pneumonia C: Staphylococcus aureus D: Escherichia coli

which is the major pathogen of the aspiration abscess() A: staphylococcus aureus B: Anaerobic bacteria C: pseudomonas aeruginosa D: Klebsiella pneumoniae E: streptococcus aureus

Which is the most common pathogen in infant acute bronchiolitis? A: Respiratory syncytial virus B: Influenza virus C: Rhinovirus D: Ecovirus E: Coxsackie virus