Bacteriology

There are good staph bacteria (Staphylococcus epidermidis), bad staph (Staphylococcus aureus), and really bad, pathogenic staph (MRSA). Here's a comparison.

Nov 17, 2009 - Tami Port

Morning's the worst of it; when that sticky, smelly film covers teeth and tongue. Some call it morning breath, or dragon breath, but what really causes halitosis?

Jul 24, 2009 - Tami Port

In this simple classroom experiment students place oral samples in test tubes of mouthwash to determine rinse time and brands most effective in killing bacteria.

Jan 10, 2009 - Tami Port

Overuse of broad spectrum antibiotics have created superbugs such as Clostridium difficile (C. diff) and Methicillin-resistant Staphylococcus (MRSA).

Oct 31, 2008 - Tami Port

Endospores are somewhat like bacterial seeds, tough structures that allow some bacteria to go dormant under unfavorable conditions.

Oct 22, 2008 - Tami Port

Dental caries or cavities are caused by acidic metabolites produced by bacteria that normally inhabit the mouth, where they feed on carbohydrates.

Jun 23, 2008 - Tami Port

Although bacterial reproduction results in the generation of clones, prokaryotes can undergo genetic recombination through transformation, transduction, and conjugation.

Jun 14, 2008 - Tami Port

Endospore staining involves application of a series of dyes. Malachite green stains endospores and safrinin dyes vegetative cells pink. Here's endospore stain procedure.

Jun 12, 2008 - Tami Port

Acid fast staining involves the application of a series of dyes that leaves some bacteria pink (Acid-fast) and others purple (Nonacid-fast). Here's how this stain works.

Jun 12, 2008 - Tami Port

Differential stains and media can provide preliminary identification of microbes, but to identify Gram- bacteria to the species, a more sophisticated test is required.

May 29, 2008 - Tami Port

Antibiotics are chemotherapeutic agents used to inhibit or kill bacteria (prokaryotic organisms). How do quinolones destroy bacteria without hurting our cells?

May 22, 2008 - Tami Port

Antibiotics are chemotherapeutic agents used to inhibit or kill bacteria (prokaryotic organisms). How do sulfonamides impact bacteria without hurting our cells?

May 2, 2008 - Tami Port

Antibiotics are chemotherapeutic agents used to inhibit or kill bacteria (prokaryotic organisms). How does penicillin destroy bacteria without hurting our cells?

Apr 21, 2008 - Tami Port

Antibiotics are chemotherapeutic agents used to inhibit or kill bacteria (prokaryotic organisms). How do they destroy bacteria without hurting our cells?

Apr 14, 2008 - Tami Port

Most bacteria have one of these two types of cell walls. The differential Gram stain uses two dyes to distinguish between bacteria based on cell wall structure.

Apr 14, 2008 - Tami Port

Most bacteria have one of these two types of cell walls. The differential Gram stain uses two dyes to distinguish between bacteria based on cell wall structure.

Apr 14, 2008 - Tami Port

Antibiotics are chemotherapeutic agents used to inhibit or kill bacteria (prokaryotic organisms). How do aminoglycosides destroy bacteria without hurting our cells?

Apr 13, 2008 - Tami Port

Antibiotics are chemotherapeutic agents used to inhibit or kill bacteria (prokaryotic organisms). How do macrolides destroy bacteria without hurting our cells?

Apr 13, 2008 - Tami Port

Gram- bacteria stain pink due to the location of cell wall peptidoglycan and an external LPS membrane. Here's how Gram staining identifies Gram negative organisms.

Mar 27, 2008 - Tami Port

Gram + bacteria stain purple due to the chemistry and structure of their peptidoglycan cell wall. Here's how Gram staining identifies Gram-positive organisms.

Mar 25, 2008 - Tami Port

Gram staining involves the application of a series of dyes that leaves some bacteria purple (Gram +) and others pink (Gram -). Here's how the Gram stain works.

Mar 25, 2008 - Tami Port

The amount and location of peptidoglycan in the prokaryotic cell wall is what determines whether a bacterium is Gram-positive or Gram-negative.

Sep 30, 2007 - Tami Port