Salmonella Typhi
By: Susana Vergil-Alvarado
Shape and Arrangement
• Shape: Rod
• Flagellated and motile
• Non-spore forming
Classification
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Kingdom: Eubacteria
Phylum: Proteobacteria
Class: Gamma Proteobacteria
Order: Enterobacteriales
Family: Enterobacteriaceae
Genus: Salmonella
Species: Salmonella Typhi
Unique Structural Features:
• Mode of nutrition: Salmonella Typhi gets its
food from other living organisms.
• Effect of Oxygen: Facultative anaerobic
Historical Significance
• It is a multi-organ pathogen that inhabits the
lymphatic tissues of the small intestine, liver,
spleen and blood stream of infected humans.
• It is a Heterotrophic bacteria
Gram Stain Characteristics
• Salmonella Typhi is Gram
Negative (light red or pink color)
Health-Related Issues:
Typhoid Fever: Caused by the ingestion of the
bacteria in contaminated food or water
Treatment: Antibiotics that kill the Salmonella
bacteria.
Modes of transmission: Oral transmission via food
or beverages handled by an individual who
chronically sheds through urine.
Hand-to-mouth transmission after using a
contaminated toilet and neglecting hand hygiene
Oral transmission via sewage-contaminated water
or shellfish
Citations
• Salmonella serotype Typhi.“Salmonella
blog.”<http://www.d214.org/district_library/writing_a_works_cited
_page.aspx#image>
• Salmonella Typhi diagram. “Marler blog.”
<http://www.google.com/imgres?imgurl=http://www.marlerblog.c
om/uploads/image/salmonella_typhimurium_300.jpg&imgrefurl=ht
tp://www.marlerblog.com/case-news/at-least-336-sick-in-multistate-salmonella-typhimuriumoutbreak/&usg=__FTjqf09INlCXtWummjOhpIkbl94=&h=315&w=30
0&sz=49&hl=en&start=3&zoom=1&itbs=1&tbnid=N2EcNwgyzjnsX
M:&tbnh=117&tbnw=111&prev=/images%3Fq%3Dsalmonella%2Bt
yphi%2Bbacteria%26hl%3Den%26sa%3DX%26gbv%3D2%26tbs%3D
isch:1&ei=AghHTYr-E4OBlAe9j-HzDw(info)>
• Salmonella Typhi, the agent of typhoid. Gram stain. “The Microbial
World.”<http://textbookofbacteriology.net/themicrobialworld/Salm
onella.html>