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H and E Stained lung sections of patient from whom the Legionella pneumophilia was isolated, showing inter-alveolar exudation of macrophages and poly-morphic leukocytes. Legionella pneumophilia is not stained

H and E Stained lung sections of patient from whom the Legionella pneumophilia was isolated, showing inter-alveolar exudation of macrophages and poly-morphic leukocytes. Legionella pneumophilia is not stained Read More

HELICOBACTER

Helicobacter pylori (yellow), a common bacterium that lives in the stomach lining, increases the risk of stomach cancer (brown cells) and peptic ulcers. But over time H. pylori can reduce stomach acid and acid reflux, which may help fend off esophageal cancer. The microbe also appears to help pr... Read More

6.5% NaCl Media

Important ingredients: 6.5% salt, dextrose, bromcresol purple
Differential/Selective: used to test for salt tolerance and can be used to identify enterococcal group D streptococci. NaCl is a selective agent and those organisms that can grow in higher salt concentrations also ferment the dextro... Read More

Bacteria battling each other to survive

"Two types of bacteria found in the soil have enabled scientists to get the dirt on how resistance to antibiotics develops along with a separate survival strategy.The study identifies an atypical antibiotic molecule and the way in which the resistance to that molecule arises, including the ident... Read More

Human African trypanosomiasis

A false-coloured scanning electron microscope image of an African trypanosome, the parasite which causes sleeping sickness. Read More

Kirby-Bauer disk diffusion

Kirby-Bauer disk diffusion susceptibility test on coagulase-negative Staphylococcus aureus and E.coli grown on Mueller-Hinton agar with tetracycline (30 µg), cephalothin (30 µg), erythromycin (15 µg), chloramphenicol (30 µg), vancomycin (30 µg), penicillin (10 µg), streptomycin (10 µg), and novo... Read More

Gram stain of mixed culture of cocci and rods

Gram stain of mixed culture of cocci and rods.Streptobacillus morphological arrangement is shown. (Approx X1000). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Spirogyra and Oscillatoria

A microscopic view of Spirogyra (eukaryote) and Oscillatoria (prokaryote). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Virions of a hantavirus known as the Sin Nombre virus (SNV).

This transmission electron micrograph (TEM) revealed the ultrastructural appearance of a number of virus particles, or “virions”, of a hantavirus known as the Sin Nombre virus (SNV).

In November 1993, the specific hantavirus that caused the Four Corners outbreak was isolated. Using tissue fro... Read More

throat culture on blood agar and tellurite medium. black colonies are Corynebacterium diphtheriae

throat culture on blood agar and tellurite medium. black colonies on tellurite medium are Corynebacterium diphtheriae Read More

Salmonella grown on Salmonella-Shigella (S-S) Agar

The following picture shows the isolated black colonies of Salmonella on Salmonella-Shigella (S-S) Agar. S-S Agar is used as a selective and differential medium for the isolation of Salmonella and some Shigella species. The inclusion of bile salts is to inhibit gram-positive organisms. Ferric ci... Read More

Supernova bacteria

Bacteria engineered to act as genetic clocks flash in synchrony. Here, a "supernova" burst in a colony of coupled genetic clocks just after reaching critical cell density. Superimposed: A diagram from the notebook of Christiaan Huygens, who first characterized synchronized oscillators in the 17t... Read More

Streptococcus pyogenes Gram Stain

Gram stain done on S. pyogenes showing the characteristic long G+ streptococcus chains. Culture grown on blood agar for 48 hrs at 37 degree’s C. Read More

Streptococcus pyogenes

Throat swab of (5) years old child from emergency department for culture and sensitivity clinical summary scarlet fever.

Streptococcus pyogenes, or Group A Streptococcus, is a spherical, Gram-positive bacterium.[1] S. pyogenes displays streptococcal group A antigen on its cell wall and typic... Read More

Wheat infected with ergot fungus

Confocal micrograph of wheat stigma hairs (blue) infected with ergot fungus (light pink). The stigma is the female part of the plant. The plant is fertilised by the (male) pollen grain, which sticks to a stigma hair causing growth of a pollen tube into the plant's ovary, causing an embryonic whe... Read More

Feeling Blue, Trypanosoma brucei

Trypanosoma brucei, a protozoan parasite, is the causative agent of African sleeping sickness in humans (T. b. gambiense and T. b. rhodesiense) and nagana in cattle (T. b. brucei). These diseases result in much economic hardship and morbidity in Sub-Saharan Africa. The life cycle of these organi... Read More

Lipid Agar

Lipid Plate/Tributyrin Agar used to test for an organisms ability to produce the exoenzyme lipase which breaks down the lipids in the agar creating a clear zone around the organism. (A) Serratia marcesens, lipid hydrolysis, indicated by a zone of clearing around the growing colony, as well as th... Read More

Micrococcus luteus line inoculation

Line inoculation of Micrococcus luteus on a TSA slant showing Filiform, uniform growth, along the margin. Culture was grown for 3 days at 37 degrees, M. luteus usually takes 3+ days for good growth. Read More

Mycoplasma pneumoniae. Macrophotograph of 16mm petri dish containing microcolonies characteristics of broth-grown Mycoplasma pneumoniae

Mycoplasma pneumoniae. Macrophotograph of 16mm petri dish containing microcolonies characteristics of broth-grown Mycoplasma pneumoniae Read More

Conidia of Exophiala jeanselmei

Conidia of Exophiala jeanselmei. Sporulation is from 'shoulder' or distal end of a hyphal cell, or from the tip of a conidiophore. LCB stain. Read More
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