Lactose fermenting Salmonella paratyphi A : A case report
Journal Title: Journal of Microbiology and Infectious Diseases - Year 2014, Vol 4, Issue 1
Abstract
There are more than 2500 antigenic types of the genus Salmonella. Typhoid fever is caused by Salmonella typhi,Salmonella paratyphi A, B and C. Characteristically all four of these is non-fermenters of lactose. We report a case of lactose fermenting Salmonella paratyphi A isolated from the blood sample of a 27 years old male with 12 days history of fever.Lactose fermenting colonies were isolated on Crystal Mac Conkey agar plate after 24 hours incubation at 35°C. It was identified using colony morphology, Gram staining, Oxidase test, sugar sets (Indole, Urea, Citrate, Triple sugar iron tests) and API 20E. It was confirmed as Salmonella paratyphi A after positive agglutination reaction with Salmonella antisera polyvalent A-S and ntiserum O 2 The emergence of lactose fermenting strain of Salmonella paratyphi A is important because it is likely to be missed or misdiagnosed. As Salmonella paratyphi A is taking over Salmonella typhi as cause of typhoid and is exhibiting high levels of drug resistance too. So in order to avoid incorrect identification it should be kept in mind that S. paratyphi A can very rarely yield lactose fermenting colonies on Crystal MacConkey agar after 24 hours incubation. J Microbiol Infect Dis 2014;4(1): 30-32 Key words: Antibiotic resistance, Lactose fermentation, Salmonella, Salmonella paratyphi A
Authors and Affiliations
Mahwish Latif, Mehreen Gilani, Javaid Usman, Tehmina Munir, Maria Mushtaq, Nazish Babar
Keywords
Related Articles
- EP ID EP152173
- DOI 10.5799/ahinjs.02.2014.01.0120
- Views 123
- Downloads 0
Effect of subinhibitory concentration of cefetoxime on biofilm formation
Objectives: In the present study, we have analyzed ESBL-producing S. typhi’s capability in forming a significant amount of biofilm on plastic and glass surface, and the influence of cefetoxime on biofilm development at s...
Risk factors for nosocomial Acinetobacter bacteremia: a case-control study of intensive care unit patients
Objective: This study was performed to identify risk factors and to determine the attributable mortality and clinical outcomes of nosocomial Acinetobacter bacteremia in our intensive care unit. Methods: A retrospective...
Antimicrobial susceptibility, virulence factors and biofilm formation among Staphylococcus aureus isolates from hospital infections in Kerman, Iran
Objective: The aims of present study were to determine the antimicrobial susceptibility, virulence factors and biofilm formation among MRSA hospital isolates of Staphylococcus aureus. Methods: Thirty non-repetitive stra...
Travma sonrası kafa kemiğinde nekrotik yara ilişkili kronik osteomyelit: Olgu sunumu
Otuziki yaşında erkek hasta acil servise sağ temporoparietal alanda 4x11 cm doku defekti ile getirildi. Beyin tomografisinde sağ parietal alanda doku defekti görüldü fakat kemik doku bütünlüğü korunmaktaydı. Kraniyal kem...
A Newer in Vitro Model for the Study of Development of in Vitro Resistance to Penicillin in a Novel Isolate of Streptococcus tigurinus
Objectives: Streptococcus tigurinus is a new member of the Streptococcus mitis group. It causes various invasive infections. Its isolation from the oral cavity has been reported recently for the first time in our previou...