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2024, Vol: 14, Issue: 4
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Case Report 


Lactose Fermenting Salmonella Paratyphi A: A case report

Mahwish Latif, Mehreen Gilani, Javaid Usman, Tehmina Munir, Maria Mushtaq, Nazish Babar.


Cited By:14

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 antiserum O2.
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


 
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How to Cite this Article
Pubmed Style

Latif M, Gilani M, Usman J, Munir T, Mushtaq M, Babar N. Lactose Fermenting Salmonella Paratyphi A: A case report. J Microbiol Infect Dis. 2014; 4(1): 30-32 . doi:10.5799/jmid2014.01.0120

Web Style

Latif M, Gilani M, Usman J, Munir T, Mushtaq M, Babar N. Lactose Fermenting Salmonella Paratyphi A: A case report. https://www.jmidonline.org/?mno=302657304 [Access: January 09, 2025]. doi:10.5799/jmid2014.01.0120

AMA (American Medical Association) Style

Latif M, Gilani M, Usman J, Munir T, Mushtaq M, Babar N. Lactose Fermenting Salmonella Paratyphi A: A case report. J Microbiol Infect Dis. 2014; 4(1): 30-32 . doi:10.5799/jmid2014.01.0120


Vancouver/ICMJE Style

Latif M, Gilani M, Usman J, Munir T, Mushtaq M, Babar N. Lactose Fermenting Salmonella Paratyphi A: A case report. J Microbiol Infect Dis. (2014), [cited January 09, 2025]; 4(1): 30-32 . doi:10.5799/jmid2014.01.0120


Harvard Style

Latif, M., Gilani, . M., Usman, . J., Munir, . T., Mushtaq, . M. & Babar, . N. (2014) Lactose Fermenting Salmonella Paratyphi A: A case report. J Microbiol Infect Dis, 4 (1), 30-32 . doi:10.5799/jmid2014.01.0120


Turabian Style

Latif, Mahwish, Mehreen Gilani, Javaid Usman, Tehmina Munir, Maria Mushtaq, and Nazish Babar. 2014. Lactose Fermenting Salmonella Paratyphi A: A case report. Journal of Microbiology and Infectious Diseases, 4 (1), 30-32 . doi:10.5799/jmid2014.01.0120


Chicago Style

Latif, Mahwish, Mehreen Gilani, Javaid Usman, Tehmina Munir, Maria Mushtaq, and Nazish Babar. "Lactose Fermenting Salmonella Paratyphi A: A case report." Journal of Microbiology and Infectious Diseases 4 (2014), 30-32 . doi:10.5799/jmid2014.01.0120


MLA (The Modern Language Association) Style

Latif, Mahwish, Mehreen Gilani, Javaid Usman, Tehmina Munir, Maria Mushtaq, and Nazish Babar. "Lactose Fermenting Salmonella Paratyphi A: A case report." Journal of Microbiology and Infectious Diseases 4.1 (2014), 30-32 . Print. doi:10.5799/jmid2014.01.0120


APA (American Psychological Association) Style

Latif, M., Gilani, . M., Usman, . J., Munir, . T., Mushtaq, . M. & Babar, . N. (2014) Lactose Fermenting Salmonella Paratyphi A: A case report. Journal of Microbiology and Infectious Diseases, 4 (1), 30-32 . doi:10.5799/jmid2014.01.0120


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All correspondence should be addressed to:

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Journal of Microbiology and Infectious Diseases

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University of Tripoli

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