Characteristics of Salmonella Typhi Bacteria

Characteristics of Salmonella Typhi Bacteria
Coming up next: What is Shigella? - Causes, Symptoms & Treatment

You're on a roll. Keep up the good work!

Take Quiz Watch Next Lesson
 Replay
Your next lesson will play in 10 seconds
  • 0:00 Definition of Salmonella Typhi
  • 1:30 Symptoms and Treatments
  • 3:00 Lesson Summary
Save Save Save

Want to watch this again later?

Log in or sign up to add this lesson to a Custom Course.

Log in or Sign up

Timeline
Autoplay
Autoplay
Speed

Recommended Lessons and Courses for You

Lesson Transcript
Instructor: Brekke Peterson Munks
Did you know that there is more than one kind of Salmonella? In this lesson, you will explore the physical and pathogenic characteristics of Salmonella typhi.

Definition of Salmonella Typhi

We always hear, wash your hands after you touch meat, use the restroom, or if you are in a dirty place. For safety reasons, we are told not to drink ocean water or water in which people swim in or might have sewage sludge. But why do we do this? We do this to ward off infection from Salmonella typhi.

Salmonella typhi is bacteria that causes typhoid fever and has a rod-shaped conformation and is aerobic. Aerobic organisms are living things that require oxygen to survive. This bacteria is also Gram-negative, meaning that it has a three-layer cell membrane, essentially. The first layer is the outer membrane, in the center is a thin peptidoglycan layer followed be an inner plasma membrane. The thin peptidoglycan layer is characteristic of all Gram-negative bacteria. The bacterial cell Salmonella typhi is a motile bacteria and is able to move due to flagella. A flagella is a special organelle on the outside of the bacteria that looks like an eyelash or the tail of a sperm. However, this eyelash is able to whip around creating locomotion, propelling the Salmonella typhi around.

Salmonella typhi is a serovar of Salmonella enterica. A serovar is a microbe that is very similar to other Salmonella enterica bacteria, but each serovar has distinct differences that cause our immune system to react differently to the bacteria. In terms of Salmonella serovars, different cell surface antigens make up the serovar signature that is specific to each type. An antigen is simply the receptor on the outside of the cell that causes a certain immune response.

Symptoms and Treatments

As mentioned earlier, ff you ever are diagnosed with typhoid fever, you have an S. typhi infection. This disease affects over 17 million people annually and can cause around a half a million deaths each year. It is caused by this little bacterium S. typhi, which only lives in humans.

This bacterium infects the liver, spleen, small intestines and the blood stream of humans causing typhoid fever. Africa, Asia and Latin American are regions prevalent to typhoid outbreak. Individuals with infection typically suffer from a quick onset of fever. This increased body temperature is followed by nausea, a painful headache and a reduction in appetite. If gone untreated, other symptoms of enlarged spleen and dehydration can occur.

To unlock this lesson you must be a Study.com Member.
Create your account

Register to view this lesson

Are you a student or a teacher?

Unlock Your Education

See for yourself why 30 million people use Study.com

Become a Study.com member and start learning now.
Become a Member  Back
What teachers are saying about Study.com
Try it risk-free for 30 days

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Create an account to start this course today
Try it risk-free for 30 days!
Create an account
Support