{"id":892,"date":"2025-12-08T03:49:56","date_gmt":"2025-12-08T03:49:56","guid":{"rendered":"http:\/\/wmtc2006.com\/?p=892"},"modified":"2025-12-08T03:49:56","modified_gmt":"2025-12-08T03:49:56","slug":"these-antibody-titers-were-significantly-lower-than-those-in-vaccinated-healthy-adults","status":"publish","type":"post","link":"https:\/\/wmtc2006.com\/?p=892","title":{"rendered":"\ufeffThese antibody titers were significantly lower than those in vaccinated healthy adults"},"content":{"rendered":"

\ufeffThese antibody titers were significantly lower than those in vaccinated healthy adults. against the seven conjugate vaccine serotypes. These antibody titers were significantly lower than those in vaccinated healthy adults. Finally, on average, a 2.5-fold rise in serotype-specific and functional CCT129202 antibodies inS. pneumoniae-positive sputum cultures was observed during exacerbation. Our data indicate that pneumococcal colonization in COPD patients is frequently caused by vaccine serotype strains. Moreover, pneumococcal colonization is a risk factor for exacerbation of COPD. Finally, our findings demonstrate that COPD patients are able to mount a significant immune response to pneumococcal infection. COPD patients may therefore benefit from pneumococcal vaccination. Chronic obstructive pulmonary disease (COPD) is a major cause of morbidity and mortality in adults. According to the Global Burden of Disease Study, COPD is the fifth most common disease and fourth leading cause of death in the world. Both the prevalence and mortality rate CCT129202<\/a> are still expected to increase in the coming decades (11). The chronic course of this disease is frequently interrupted by CCT129202 acute exacerbation, which has a major impact on the morbidity and mortality of COPD patients (17). Acute exacerbation of COPD is characterized by an acute sustained worsening of the patient’s condition from a stable state, beyond normal day-to-day variations, which occurs one to three times a year and may warrant additional treatment (3,18). Bacterial infections are thought to contribute to the pathogenesis and clinical course of COPD (20). Several recent studies have shown a clear association between the isolation of bacterial species such asStreptococcus pneumoniae,Moraxella catarrhalis, andHaemophilus influenzaeand acute exacerbation (18). Patel et al. were the first investigators who observed a significant relation between lower airway colonization in the stable state and exacerbation frequency. However, their study population was too small to investigate the correlation for individual bacterial species (12). In contrast, Sethi et al. showed a significant increase in the occurrence of exacerbation whenS. pneumoniaeandM. catarrhaliswere isolated (18). We hypothesize that the prevention of bacterial growth in the airways of COPD patients will significantly decrease the occurrence of exacerbation and thus improve the quality of life for COPD patients. One of the pathogens that is frequently involved in colonization and infection of CCT129202 COPD patients isS. pneumoniae. For this pathogen, a 23-valent polysaccharide vaccine and a 7-valent conjugate vaccine are available. The 23-valent vaccine is protective against pneumococcal invasive disease in adults and elderly patients, but not in children under the age of two or immunocompromised patients (14). In addition, the Mouse monoclonal to IgG1 Isotype Control.This can be used as a mouse IgG1 isotype control in flow cytometry and other applications<\/a> 23-valent polysaccharide vaccine has not shown a significant reduction in cases of pneumonia in elderly patients (7). Moreover, the polysaccharide vaccine induces no immunological memory, which necessitates revaccination (2). In contrast, the conjugate vaccine is effective in young children against invasive as well as mucosal diseases and elicits immunological memory, but it covers fewer (7) serotypes. To investigate the relevance of pneumococcal colonization and infection in COPD patients, we determined the effect of pneumococcal colonization on the development of exacerbation. In addition, to assess the theoretical role of pneumococcal vaccination in COPD patients, we determined the serotype distribution among pneumococcal sputum isolates found during colonization and infection. Finally, we investigated the presence of immunoglobulin G (IgG) antibodies against pneumococcal capsular polysaccharides in COPD patients and the development of capsule-specific antibodies as a result of pneumococcal infection during exacerbation. == MATERIALS AND METHODS == == Study population. == Two hundred sixty-nine patients, aged 40 to 75 years, in the outpatient department of Medisch Spectrum Twente Hospital, Enschede, The Netherlands, participating in the COPE study and with a history of COPD, were recruited from May 1999 through March 2000 (19). The patients had to meet the following criteria: (i) a clinical diagnosis of stable COPD, as defined by American Thoracic Society criteria; (ii) no history of asthma; (iii) no exacerbation in the month prior to enrollment; (iv) current or.<\/p>\n","protected":false},"excerpt":{"rendered":"

\ufeffThese antibody titers were significantly lower than those in vaccinated healthy adults. against the seven conjugate vaccine serotypes. 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