× Didn't find what you were looking for? Ask a question

Recent Posts • Latest Topics • Unanswered Questions

A throat swab is taken from a patient with a respiratory infection. After 24 hou

colleen

wrote...

Valued Member

Posts: 17076

Rep:

12 years ago

A throat swab is taken from a patient with a respiratory infection. After 24 hou

A throat swab is taken from a patient with a respiratory infection. After 24 hours, 1- to 3-mm colonies develop, which are round, mucoid, nonpigmented, and dimpled in the middle. What is the most likely pathogen, and how could you confirm the diagnosis on the culture?

Read 2343 times

1 Reply

Report

Sunshine ☀ ☼

Related Topics

Replies

lewis

wrote...

Valued Member

12 years ago

The colonies described are characteristic of Streptococcus pneumoniae. Diagnosis of this pathogen is confirmed if they are alpha-hemolytic on blood agar when grown aerobically and beta-hemolytic when grown anaerobically. Pneumococcal colonies can be differentiated from other colonies of alpha-hemolytic strains by adding a drop of bile to a colony. The bile triggers chemicals in S. pneumoniae that lyse the cells. The colony dissolves in a few minutes, confirming that they are pneumococcal colonies.

Report

New Topic

Quick Reply

Explore

Post your homework questions and get free online help from our incredible volunteers

1440 People Browsing

Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook

Live Chat

AJAX Chat © blueimp.net Integrated with SMF

Related Images

3209

333

964

Your Opinion

Previous poll results: Which of the following is the best resource to supplement your studies:

It's sore throat season, why does my mucus have red spots?

Bonobos, Chimpanzees, and the 98% DNA Link

The Toxic Skin and Fungi Defense

Courses by Biology Forums

Strange Ingredients Lurking in Doritos Chips

Ready to ask a question on Biology Forums? Try it out

Join Our Community

Biology Forums - Study Force is a free online homework help service catered towards college and high school students. Get homework help and answers to your toughest questions in biology, chemistry, physics, mathematics, engineering, accounting, business, humanities, and more. Master your assignments quickly with thousands of step-by-step solutions to countless textbook questions asked and answered by our members. If we don't have your question, don't worry. You can ask any homework question and get expert homework help in as little as two hours.

Our extensive online study community is made up of college and high school students, teachers, professors, parents and subject enthusiasts who contribute to our vast collection of study resources: textbook solutions, study guides, practice tests, practice problems, lecture notes, equation sheets and more. With our help, your homework will never be the same!

Join for free today

How is Biology Forums - Study Force different than tutoring?

Home Search Q & A Board Gallery Resource Library Blog Dictionary Chat	Quick Links Start a Topic Latest Topics Unanswered Questions Courses Study Tools Browse by Textbook	Social Facebook YouTube Community Stats Who's Online Trending Staff	Help About Us Take the Tour Study Tips Posting Guidelines Terms and Policies Contact Us
Biology Forums - Study Force © 2010-2024 \| Powered by SMF \| SMF © 2015, Simple Machines \| Sitemap Biology-Forums.com is not affiliated with any publisher. Book covers, title and author names appear for reference only.