FIG 2.

Serotype-specific immunoglobulin (Ig) response (convalescent/acute Ig titer ratio) to the causative serotype in pneumococcal pneumonia patients with respect to culture site. Only one site per patient is presented. The patient was included in the blood category if the blood culture was positive, the sputum category if the sputum culture was positive and blood culture was negative, and the nasopharynx category if the culture from nasopharyngeal secretions was positive and no blood culture or sputum culture was positive. ns, nonsignificant.