ABSTRACT
Resumen El empiema necessitatis (EN) constituye una muy rara complicación de un empiema pleural en el cual la infección se extiende a los tejidos blandos adyacentes. La etiología por anaerobios es muy infrecuente y se da en el curso de infecciones crónicas. Se presenta el primer caso de empiema necessitatis por Campylobacter rectus. La identificación de este agente se efectuó por espectrometría de masas (MALDI-TOF MS) y su sensibilidad antimicrobiana se determinó por el método epsilométrico.
Abstract Empyema necessitatis (EN) is a very rare complication of a pleural empyema, in which the infection extends to adjacent soft tissues. Anaerobic bacteria are very rare etiologic agents of EN, which occurs in the course of chronic infections. We present the first case of empyema necessitatis caused by Campylobacter rectus. Bacterial identification was carried out by mass spectrometry (MALDI-TOF MS) and antimicrobial susceptibility was determined by the epsilometer method.
ABSTRACT
Empyema necessitatis (EN) is a very rare complication of a pleural empyema, in which the infection extends to adjacent soft tissues. Anaerobic bacteria are very rare etiologic agents of EN, which occurs in the course of chronic infections. We present the first case of empyema necessitatis caused by Campylobacter rectus. Bacterial identification was carried out by mass spectrometry (MALDI-TOF MS) and antimicrobial susceptibility was determined by the epsilometer method.
Subject(s)
Empyema, Pleural , Humans , Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization , Empyema, Pleural/microbiologyABSTRACT
Two series of zinc salts, [EtZn][A] and Zn[A]2, with weakly coordinating anions [A]- as counterions have been prepared, and their activities as catalysts for hydrosilylation reactions of 1-hexene, benzophenone, and acetophenone have been investigated. The counterions and per- and partially chlorinated 1-ammonio-closo-dodecaborate anions [Me3NB12Cl11]- [1]-, [Pr3NB12H5Cl6]- [2]-, [Bu3NB12H4Cl7]- [3]-, and [Hex3NB12H5Cl6]- [4]- were chosen as potential and more readily available alternatives to carborate anions such as [CHB11Cl11]- and [HexCB11Cl11]-. The basicity of anion [4]- was determined as being close to that of the triflimide anion [N(SO2CF3)2]-, and the fluoride ion affinities (FIAs) of compounds [EtZn][2] and Zn[2]2 are lower than those of the Lewis acids B(C6F5)3 and Zn[HexCB11Cl11]2. The higher anion basicity and the resulting lower Lewis acidity of the zinc centers result in low activity in 1-hexene hydrosilylation catalysis and only moderate activity in the hydrosilylation catalysis of benzophenone and acetophenone.
