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tissue section h & e strain diptheritic tonsillitis

tissue section h & e strain diptheritic tonsillitis Read More

Burkholderia cepacia

Scanning Electron Micrograph of Burkholderia cepacia.

Burkholderia cepacia is the name for a group or “complex” of bacteria that can be found in soil and water. B. cepacia bacteria are often resistant to common antibiotics.

B. cepacia poses little medical risk to healthy people. However,... Read More

Sarcocystis spp. zoites

Sarcocystis spp. zoites Read More

Anopheles sp. mosquito

This illustration depicts an Anopheles sp. mosquito transmitting sporozoites while obtaining a blood meal.

During a blood meal, a malaria-infected female Anopheles sp. mosquito inoculates its human host with sporozoites, which then infect human liver cells, where they mature into schizonts, w... Read More

Dr. Robot (he kind of looks like one) is telling you . . .

. . . to do YOUR part to help stamp out what are now called STI's. Funny how as our knowledge of STI's and our ability to treat them has bloomed, our societal level of comfort with such PSAs seems to have withered. I used to see cleverly designed (and carefully/antiseptically couched) PSAs ab... Read More

Yersinia pestis

As a closer view of PHIL 12265, this photograph depicts the colonial morphology displayed by Gram-negative Yersinia pestis bacteria, which was grown on a medium of sheep's blood agar (SBA), for a 72 hour time period, at room temperature. Y. pestis is the bacterium responsible for causing the inf... Read More

Oral bacterial colonies, including Capnocytophaga and Aggregatibacter

This color-enhanced photomicrograph shows different species of bacteria that cause dental plaque - a colorless film that forms on teeth caused by the growth of bacterial colonies. Plaque develops naturally, and in most cases can be easily removed with regular brushing. However, if left it can ha... Read More

Corynebacterium diphtheriae on tellurite

Corynebacterium diphtheriae on tellurite Read More

Entomophthora coronata in tissue

Entomophthora coronata in tissue. Splendore-Hoeppli effect. H & E stain (450X) Read More

Zoonotic villains #1 - Marburg virus

Saints preserve us from this one. A highly contagious hemorrhagic fever, Marburg is less well known that it's cousin Ebola, (they're both members of the deeply troublesome Filovirus family) but no less deadly.
Read More

Phialophora richardsiae

Magnified 1125X, this photomicrograph revealed some of the ultrastructural morphology displayed by the dematiaceous (pigmented) filamentous fungus, Phialophora richardsiae.

Note the septate hyphae from which sprout the short conidiophores, and still further distally one can see the flask-shap... Read More

Cryptococcus neoformans

Cryptococcus neoformans abscess. H & E stain (1000X) Read More

Pellicle on the surface of a broth medium

The presence of a pellicle on the surface of a broth medium. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Enterococcus faecalis

The bacterium, Enterococcus faecalis, which lives in the human gut, is just one type of microbe that will be studied as part of NIH's Human Microbiome Project. Read More

Crystal violet stained cocci

Crystal violet stained cocci. Tetrads, and diplococcal and staphylococcal arrangements are present. (approx. 1000 X). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Gram-stained preparation of Bacillus subtilis

Gram-stained preparation of Bacillus subtilis showing rods, and spores (empty areas). (approx. 1000 X). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. 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

Specific F.A. staining of pleomorphic organisms in sputum of patient with tuberculosis

Specific F.A. staining of pleomorphic organisms in sputum of patient with tuberculosis Read More

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

Bacillus anthracis tenacity positive on sheep blood agar

B. anthracis Colony Characteristics: A. Consistency sticky (tenacious). When teased with loop, colony will stand up like beaten egg white.

Read More
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