ABSTRACT
Purpose:Infections due to invasive non-typhoid salmonella can be dangerous and fatal. The mode of infection and the severity varies from the typhoidal fevers. It is important to find the association between clinical features and the infecting serovar to understand the pathophysiology and course of treatment Methods:In the present study, extra-intestinal specimens (blood, cerebrospinal fluid and pus) from three patients suffering from septicaemia, meningitis and osteomyelitis were received. Micro-biological and biochemical test for species identification and antibiotic susceptibility was done as per standard protocol.Further, PCR based amplification and sequencing of a portion of the flagellin gene (FliC) was done to confirm the serovar.Results: Salmonellaentericawas identified from all the threeby microbiological and biochemical examination.The sequence of the Flic gene confirmed the serovar to be S.typhimurium. All the patients were treated successfully for the infectionby appropriate antibiotic therapy. Conclusion:The study highlights that serovarTyphimurium is common in invasive non-typhoidal salmonellosis and its pathophysiology and virulence factors expression should be understood in various organ types for better treatment options and outcomes
ABSTRACT
Background: Recently, the isolation of this pathogen in hospital settings is increasing and multidrug-resistant strains are emerging; these strains present a challenge for clinician and the clinical microbiologist because of their increased occurrence in nosocomial infection. The current study was done to find out the antibiotic sensitivity pattern of Citrobacter species from various clinical specimens. Materials and Methods: Samples were collected from patients in accordance with standard protocols. Citrobacter species were identified by conventional biochemical tests. Antibiotic susceptibility of the isolates was done by disc diffusion method according to National Committee for Clinical Laboratory Standards (NCCLS) recommendations. Results: Out of 563 isolates of Citrobacter, majority were from pus (48.1%), followed by urine (24.3%), sputum (20.3%), body fluids (05.2%), blood (02.1%). C. koseri was the predominant species [391 (70%)] isolated. Infection was nosocomialy acquired in 493 (87.4%) patients. The mean age was 39.5 years. Anti-biograms of Citrobacter isolates revealed that effective agent against Citrobacter isolates was imipenem (91.8% sensitive), followed by piperacillin/tazobactam (58.3%) and amikacin (53.4%). Conclusion: Citrobacter isolates resistant to multiple anti-microbial agents have emerged, including strains resistant to imipenem, making it an emerging nosocomial pathogen. Therefore, the results of this study suggest that surveillance of anti-microbial resistance in Citrobacter is necessary. Antibiotic policy should be formulated in the hospital. Depending on the antibiotic sensitivity pattern of the Citrobacter isolates, antibiotics should be used, and proper infection control measures should be strictly followed to prevent spread of this pathogen.