You have free access to a large collection of materials used in a college-level introductory microbiology course. The Virtual Microbiology Classroom provides a wide range of free educational resources including PowerPoint Lectures, Study Guides, Review Questions and Practice Test Questions.
1 & 2. Acid-fast stain showing both positive (Mycobacteria) and negative (Staphylococcus) results.
Non-acid Fast Bacteria Photos (Click on image to enlarge.)
Mixed +/- Acid Fast Stain Photos (Click on image to enlarge.)
Acid Fast Bacteria Photos (Click on image to enlarge.)
1. First step of acid-fast staining procedure. Applying carbolfuchsin stain to bacterial smear and heating over water bath for 3 - 5 minutes; 2. Rinsing slide after application of crystal violet counterstain; 3. Acid-fast stained slide with + control (Mycobacterium) on left, negative contol (nonacid fast bacteria) on right and unknown in center.
Acid-fast Staining Procedure Photos (Click on image to enlarge.)
Didn't find what you need?
Search SPO for a Photo
How to Prepare a Bacterial Smear for
Acid Fast (Ziehl-Neelsen) Stain
SPO VIRTUAL CLASSROOMS
SPO is a FREE science education website. Donations are key in helping us provide this resource with fewer ads.
(This donation link uses PayPal on a secure connection.)
How to Do an Acid-fast
Acid-fast Bacterial Smear and Staining Videos
Page last updated: 9/2014
The SPO Science Image Library is a continuously growing collection of free science photographs. If you use one of our free, low-res images, we just ask that you give us credit and provide a link to the SPO website (scienceprofonline.com). To enlarge an image, click on it. To save a photo to your computer, right click on it and select "Save".
For those in need of high-resolution images, we will soon be offering hi-res files of many photos in the Science Image Library. Follow us on Twitter @ScienceProfSPO to get updates on new SPO features and products. If you need a high resolution photo now, please contact us.