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Diversity of PspA: Mosaic Genes and Evidence for Past Recombination in Streptococcus pneumoniae
ABSTRACT Pneumococcal surface protein A (PspA) is a serologically variable protein of Streptococcus pneumoniae. Twenty-four diverse alleles of the pspA gene were sequenced to investigate the geneticExpand
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The pspC Gene of Streptococcus pneumoniae Encodes a Polymorphic Protein, PspC, Which Elicits Cross-Reactive Antibodies to PspA and Provides Immunity to Pneumococcal Bacteremia
ABSTRACT PspC is one of three designations for a pneumococcal surface protein whose gene is present in approximately 75% of allStreptococcus pneumoniae strains. Under the name SpsA, the protein hasExpand
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Antiphosphocholine antibodies found in normal mouse serum are protective against intravenous infection with type 3 streptococcus pneumoniae
The antiphosphocholine (PC) antibody in normal mouse sera (NMS) provides protection against intravenous infection with encapsulated strain WU2 of type 3 Streptococcus pneumoniae. Mice unable to makeExpand
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Basophils enhance immunological memory responses
The cellular basis of immunological memory remains a controversial issue. Here we show that basophils bound large amounts of intact antigens on their surface and were the main source of interleukinsExpand
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Mn2+-Dependent Regulation of Multiple Genes in Streptococcus pneumoniae through PsaR and the Resultant Impact on Virulence
ABSTRACT The concentration of Mn2+ is 1,000-fold higher in secretions than it is at internal sites of the body, making it a potential signal by which bacteria can sense a shift from a mucosalExpand
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Reduced virulence of a defined pneumolysin-negative mutant of Streptococcus pneumoniae.
Insertion-duplication mutagenesis was used to construct a pneumolysin-negative derivative of Streptococcus pneumoniae. This was achieved by first transforming the nonencapsulated strain Rx1 with aExpand
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Role of Pneumococcal Surface Protein C in Nasopharyngeal Carriage and Pneumonia and Its Ability To Elicit Protection against Carriage of Streptococcus pneumoniae
ABSTRACT Previous studies suggested that PspC is important in adherence and colonization within the nasopharynx. In this study, we conducted mutational studies to further identify the role PspC playsExpand
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Lipoprotein PsaA in Virulence of Streptococcus pneumoniae: Surface Accessibility and Role in Protection from Superoxide
ABSTRACT PsaA of Streptococcus pneumoniae, originally believed to be an adhesin, is the lipoprotein component of an Mn2+ transporter. Mutations in psaA cause deficiencies in growth, virulence,Expand
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Subclass restriction of murine anti-carbohydrate antibodies.
Examination of the subclass distribution of murine antibodies directed against groups A and C streptococcal carbohydrate, alpha-(1 leads to 3) dextran and phosphocholine yields the surprisingExpand
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Intranasal Immunization of Mice with a Mixture of the Pneumococcal Proteins PsaA and PspA Is Highly Protective against Nasopharyngeal Carriage of Streptococcus pneumoniae
ABSTRACT Acquisition of pneumococci is generally from carriers rather than from infected individuals. Therefore, to induce herd immunity againstStreptococcus pneumoniae it will be necessary to elicitExpand
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