ABSTRACT
Objective To study the functional antibody and protection effect against pneumonia disease after inoculation with PPV23 in HIV-infected adults. Methods In 2015, 63 HIV-infected adults were randomly selected in Hongkou District of Shanghai, and blood samples were collected before and one month after the inoculation of PPV23.Functional antibodies against 4 serotypes (19F, 19A, 23F, 6B) of Streptococcus pneumoniae were detected by opsonophagocyitosis killing assay (OPA).The incidence of pneumonia after PPV23 inoculation was also determined. Results The GMT of OPA antibodies against 4 serotypes 1 month after inoculation with PPV23 was significantly higher than that before inoculation in HIV-infected subjects.After inoculation, the triple growth rates of OPA antibodies against 4 serotypes in HIV-infected subjects were 50%-91.67%.The protection rate against pneumonia was 100% in 2 years after PPV23 inoculation in HIV-infected subjects when compared with same group before inoculation as well as the control group.The HIV-infected patients who received highly active antiretroviral therapy (HAART) or had CD4 count of≥300/μL showed better response in production of OPA antibodies and obtained protection against community-acquired pneumonia (CAP) after receiving PPV23. Conclusion Routine vaccination of PPV23 is recommended for HIV-infected patients with good basic conditions.
ABSTRACT
Objective To analyze functional antibody and protection effect against pneumonia after inoculation with 23-valent pneumococcal polysaccharide vaccine(PPV23)in healthy elderly. Methods In 2015, 48 healthy elderly people aged ≥60 years were randomly selected in Hongkou District of Shanghai, and their blood samples were collected before, and 1 month and 6 months after the inoculation of PPV23.Functional antibodies against 13 serotypes(1、3、4、5、6A、6B、7F、9V、14、18C、19A、19F、23F)of streptococcus pneumonia were determined by muti-specificity opsonophagocyitosis killing assay(MOPA).The incidence of community-acquired pneumonia(CAP)after PPV23 inoculation was also investigated. Results The GMT of OPA antibodies against 13 serotypes were higher 1 and 6 months after inoculation than that before inoculation.One month after the inoculation, OPA antibodies against 13 serotypes ≥2 times growth rate and ≥4 times growth rate were 64.58%-87.00% and 43.75%-75.00%, respectively.Six months after inoculation with PPV23, OPA antibodies against 13 serotypes ≥2 times growth rate and ≥4 times growth rate were 45.71%-82.86%, 40.00%-80.00%, respectively.There was no significant difference in the growth rate of OPA antibody between 6 months and 1 month after vaccination for most serotypes.Results of self-descriptive survey before and after the inoculation showed that the protection against CAP in healthy elderly people in the first and second years after PPV23 inoculation was 100.00% and 50.00%, respectively. Conclusion PPV23 has better immunogenicity and immune persistence after inoculation in healthy elderly people, and has better protective effect against CAP.