Anaerobic bacteria
Medically Relevant This is a list of medically relevant bacteria. See the associated entry within the Microbiology and Infectious Disease thread compendium for gram-positive and gram-negative for details. Clostridia Actinomyces Bacteroides Propionibacterium/Cutibacterium acnes Lactobacillus
Atypical bacteria
These bacteria do not conform to the typical gram-positive and gram-negative distinctions, largely due to differences in their cell walls. Their ecologic niche, types of diseases, and immune response are resultantly different as well. Spirochetes Spiral-shaped bacteria. While cell wall structures are technically similar to gram-negative bacteria, most are far too thin to be seen […]
Gram-negative
Gram-negative cocci (GNCs): Diplococci Neisseria Small intracellular gram-negative diplococci. Neisseria meningitidis Neisseria meningitidis is gram-negative diplococci that colonizes human nasopharynx. It is encapsulated, which distinguishes it from other Neisseria spp and provides an anti-phagocytic protection. After colonizing nasopharynx, organism can evade immune response and reach meninges via bloodstream. Patients with terminal complement deficiency are highly […]
Gram-positive
Gram-Positive Cocci (GPCs) Staphylococci Staphylococcus aureus Beta-hemolytic, golden colored colonies on blood agar. One of the most common causes of infections in humans. The main habitat is the anterior nares in humans and as a colonizer of human skin. S. aureus has several important toxins that facilitate disease, including toxic-shock superantigens. S. aureus can cause […]
Bacteria

In this section Read more in the Micro-ID compendium
Microbiology and Infectious Disease thread compendium

Additional resources Antimicrobials
Bugs and Drugs review: March 25, 2025

Transcript of session 100:01:01.050 –> 00:01:03.019Skye McKennon (she/her): Hi, Connie and Joanna. 200:02:09.960 –> 00:02:12.609SMED 175 Podium: Dr. Mckinnon. Can you hear me? 300:02:12.610 –> 00:02:14.210Skye McKennon (she/her): Now I can. Hi! 400:02:14.514 –> 00:02:24.850SMED 175 Podium: I had to turn on my mic. Do you want to take over screen sharing for your slides, […]
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Summary Table: Tissue Helminths

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Summary Table: Tissue + Blood Protozoa

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