Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove Ads
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how


What are the HACEK organisms? Haemophilus aphrophilus. Actinobacillus actinomycetemcomitans. Cardiobacterium hominis. Eikenella corrodens. Kingella species.
Which organism is the most prevalent in causing endocarditis and what are the biochemical chemical reactions? Haemophilus aphropilus. Catalase, urea, and indole = negative. Ferments lactose.
What are the two species of Kingella and which is important in children? 1) Kingella denitrificans 2) Kingella kingae, most important in children <5, causing bone and joint infections and bacteremia.
What is A. actinomycetemcomitans associated with and what are some ways to identify it? It is associated with Actinomycotic lesions, normally of the jaw, destructive periodontitis, and abscesses within the thoracic cavity. It is a coccobacillary GNR, with Morse Code appearance. Star like colony morphology but does NOT grow on MAC.
Which organism forms rosette-like arrangements on gram stain and what are the biochemical reactions? Cardiobacterium hominis. It is oxidase + and spot indole +. It is also urea, catalase, nitrate, gel, and esculin negtaive. It will NOT grow on MAC.
How is an Eikenella corrodens infection acquired? Causes bacteremia and endocarditis often seen in IV drug users or from extensive dental work. Also human bites or "clenched fist wounds."
How is Eikenella corrodens identified? Gram stain = GNR Media = grows well on BAP or CHOC but NOT MAC. some isolates may "pit" or corrode the agar. Biochemical = Oxidase, lysine, ornithine, and nitrate = postive. Catalase negative. Non-glucose utilizer.
What do all the HACEK organisms have in common? They are GNRs, that grow in increased CO2. They are the major cause of endocarditis while also considered as normal oral flora that are opportunists.