Mohamed Abbas, a science teacher at Senioritis.io

Mohamed Abbas
June 21, 2023
Microbiology

How Gram-Positive Bacteria Retain Stain and the Role of Peptidoglycan in Cell Wall Structure: An Insight

Gram positive bacteria retain the primary stain because of the: high content of the peptidoglycan in the cell wall Gram-positive bacteria retain the primary stain (crystal violet)...

Mohamed Abbas
June 21, 2023
Microbiology

Detecting Acid-Fast Organisms: An Overview of The Ziehl-Neelsen Staining Method for Mycobacteria Identification.

A positive acid-fast organism would stain: red/pink A positive acid-fast organism would stain pink or red in color after the Ziehl-Neelsen staining procedure. This staining technique is...

Mohamed Abbas
June 21, 2023
Microbiology

Effective Microbiological Specimen Collection: Why Calcium Alginate Swabs are Unsafe and How to Ensure Accurate Results using Sterile Cotton or Rayon Swabs?

________ swabs should not be used to collect microbiological specimens, as they contain fatty acids that are toxic to some bacteria. cotton Calcium alginate swabs should not...

Mohamed Abbas
June 21, 2023
Microbiology

Enhance Microbial Identification with Schaeffer-Fulton Stain: A Comprehensive Guide

The _______ is used to directly stain parasitic ova and nuclei. iodine mount The Schaeffer-Fulton stain is used to directly stain parasitic ova and nuclei. It is...

Mohamed Abbas
June 21, 2023
Microbiology

Explained: How Gram’s Iodine Solution enhances the Gram stain procedure for bacterial differentiation

In the Gram stain procedure _______ is the mordant. Gram’s Iodine In the Gram stain procedure, the mordant used is Gram’s iodine solution. The mordant is used...

Mohamed Abbas
June 21, 2023
Microbiology

Optimizing Anaerobic Culture Results: Essential Tips for Collection and Transport of Specimens

A 21-year-old patient presents with pharyngitis. A throat swab is collected and submitted for anaerobic culture. This specimen should be: rejected as unacceptable The specimen submitted for...

Mohamed Abbas
June 21, 2023
Microbiology

Unique Cell Wall Composition of Mycobacterium tuberculosis: The Reason behind Its Acid-Fast Staining Property.

Organisms such as M. tuberculosis do not gram stain well because: their waxy cell wall contains mycolic acid Mycobacterium tuberculosis does not gram stain well because of...

Mohamed Abbas
June 21, 2023
Microbiology

Why Are Some Bacteria Staining Pink on a Gram Stain? Common Causes and Solutions Explained

While performing the quality control on a gram stain procedure using a control slide of Staphylococcus and E. coli, the laboratory professional notices that all of the...