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Swarming Motility of Pseudomonas aeruginosa

Strain: Pseudomonas aeruginosa PA14
Medium: M8 minimal medium agar plates
Incubation Conditions: 48 hours at 37°C
Pseudomonas aeruginosa is a gram-negative, rod-shaped and monoflagellated bacterium that has an incredible nutritional versatility. Swarming motility, a flagellum-dependent behavi... Read More

Fusobacterium mortiferum

This is a picture of a Gram stain of an anaerobic blood culture. This pleomorfic bacteria, were Gram negative filamentous bacilli with large round bodies. The identification by MALDI-TOF was Fusobacterium mortiferum. The patient has pancreatitis. I agree if you want to share this picture, since ... Read More

Orange pigmented crustose lichens

Orange pigmented crustose lichens. From the Wistreich Collection. Read More

Lung tissue from case of Aspergillosis

Lung tissue from case of Aspergillosis. PAS stain (900X) Read More

Methicillin-Resistant Staphylococcus aureus (MRSA) Bacteria

Scanning electron micrograph of methicillin-resistant Staphylococcus aureus bacteria (yellow, round items) killing and escaping from a human white cell. Credit: National Institutes of Health/Department of Health and Human Services (NIAID) Read More

A dangerous bridge for Serratia.

Serratia spp. are widely distributed in nature. Serratia marcescens is the most common Serratia sp. associated with human disease, followed by strains of the S. liquefaciens complex: S. liquefaciens, S. grimesii and S. proteamaculans. The clinical significance of these species is largely unknown... Read More

Tricky Trichy

Trichomonas vaginalis is a protozoan parasite of the urogenital tract in men and women and causes a sexually transmitted disease, trichomoniasis, in about half of infected women. Infections are associated with pelvic inflammatory disease, adverse pregnancy outcomes, infertility, an increased inc... Read More

Clostridium difficile

This is an image of Clostridium difficile colonies grown on cycloserine mannitol agar after 48 hours.

C. difficile, an anaerobic gram-positive rod, is the most frequently identified cause of Antibiotic-Associated Diarrhea (AAC). It accounts for approximately 15-25% of all episodes of AAC.

... Read More

Algae and Diatoms

This image by Dr. Arlene Wechezak, Anacortes, Washington, United States, won 10th place in Nikon's 2009 Small World microscopy competition. Nikon's Small World Twitter feed (@NikonSmallWorld) is currently showcasing algae and larvae that are in danger in the Gulf oil spill. Read More

Helicobacter fennelliae from blood culture

Helicobacter is a Gram-negative rod with a helical shape on gram stain. The most known strain is H. pylori, which causes ulcers and chronic gastritis and is said to affect up to 50% of the human population. This particular strain, Helicobacter fennelliae is most commonly found in the feces an... Read More

Blastomyces dermatitidis

Blastomyces dermatitidis on BHI agar. Yeast phase colonies Read More

Mycobacterium smegmatis

Streak plate of Mycobacterium smegmatis grown on TSA for 96 hrs. Read More

Taenia spp. scolex

Taenia spp. scolex Read More

Paenibacillus glucanolyticus spore

Paenibacillus species have been isolated from a wide variety of sources including soil, water, the plant rhizosphere, plant materials, food, fodder, faeces and diseased insect larvae. They are facultative anaerobes or strict aerobes and mostly motile, endospore forming rods. This is the first ti... Read More

Streptococcus pneumoniae mucoid strain

Streptococcus pneumoniae cells are Gram-positive, lancet-shaped cocci. Usually, they are seen as pairs of cocci, but they may also occur singly and in short chains. In this photo a mucoid strain on blood agar showing alpha hemolysis (green zone surrounding colonies). Note the zone of inhibition ... Read More

Staphylococcus aureus

Scanning electromicrograph of Staphylococcus aureus bacteria. Credit: National Institutes of Health/Department of Health and Human Services (NIAID). Read More

The results of a pour plate after incubation

The results of a pour plate after incubation. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Several paramecia showing internal structures

Several paramecia showing internal structures. From the Wistreich Collection. Read More

Agar Double Helix

Inspired by the current Agar Art Contest and the gorgeous red of a recently isolated Serratia, I thought I'd try out my first bacteria "sketch." Using Serratia, Citrobacter, and an E. coli on Hektoen Agar I whipped up this goey DNA double helix! Read More

Toxoplasma parasite's greedy appetite may be its downfall

Toxoplasma gondii is estimated to chronically infect nearly one-third of the world's population, causing the condition Toxoplasmosis. It is most commonly associated with handling cat feaces and is a particular threat to pregnant women and immune-compromised individuals, such as HIV/AIDS patients... Read More
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