Fatal infection in adults by pneumolysin & autolysin producing, non-vaccine serotype Streptococcus pneumonia
نویسندگان
چکیده
منابع مشابه
Rapidly Fatal Hemorrhagic Pneumonia and Group A Streptococcus Serotype M1
We report 3 cases of fulminant hemorrhagic pneumonia in previously health patients. Sudden-onset hemoptysis and dyspnea developed; all 3 patients and died <12 h later of massive pulmonary bleeding, despite aggressive supportive care. Postmortem analysis showed that the illnesses were caused by group A Streptococcus emm1/sequence type 28 strains.
متن کاملStreptococcus pneumoniae deficient in pneumolysin or autolysin has reduced virulence in meningitis.
BACKGROUND The role played by pneumolysin and autolysin in pneumococcal meningitis is poorly understood. METHODS A rat model was used to investigate the disease, in which surgical implantation of a cisternal catheter allowed bacterial instillation and cerebrospinal fluid (CSF) sampling. RESULTS CSF infection of rats with wild-type pneumococci caused meningitis within 26 h, whereas isogenic ...
متن کاملDifferences in virulence of pneumolysin and autolysin mutants constructed by insertion duplication mutagenesis and in-frame deletion in Streptococcus pneumoniae
BACKGROUND Insertion duplication mutagenesis (IDM) and in-frame deletion (IFD) are common techniques for studying gene function, and have been applied to pneumolysin (ply), a virulence gene in Streptococcus pneumoniae (D39). Discrepancies in virulence between the two techniques were observed in both the previous and present studies. This phenomenon was also observed during mutation analysis of ...
متن کاملNeonatal meningitis caused by streptococcus pneumonia in Iran
Meningitis, pneumonia, and sepsis in newborns and young infants (age < 60 days) are the main causes of childhood mortality in developing countries. Even though streptococcus pneumonia is the most commonly detected microorganism in pediatric bacterial meningitis, it is rare in newborn infants. The following article reports a case of pneumococcal meningitis that was detected early in a newborn in...
متن کاملβ-sitosterol interacts with pneumolysin to prevent Streptococcus pneumoniae infection
Pneumolysin is one of the major virulence factors elaborated by Streptococcus pneumoniae; this toxin is a member of the cholesterol-dependent cytolysins. Engagement of cholesterol induces the formation of a multi-subunit complex by pneumolysin that lyses host cells by forming pores on the membrane. Because pneumolysin released by bacteria which have been killed by conventional antibiotics is st...
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ژورنال
عنوان ژورنال: Indian Journal of Medical Research
سال: 2016
ISSN: 0971-5916
DOI: 10.4103/0971-5916.184307