Magnified 1125X, this Gomori-stained photomicrograph revealed the presence of a Penicillium marneffei yeast cell, which was found in a specimen of human spleen.
P. marneffei is endemic to Southeast Asia, where it is one of the more common HIV-related opportunistic infections. Penicillium spp.... Read More
Histoplasma capsulatum in intestinal villi of brown house bat. Eptesicus fuscus from house near Clarksburg, MD. GMS stain Read More
Science blogger Cesar Sanchez of the site Twisted Bacteria (twistedbacteria.blogspot.com) created the above word cloud that was generated from approximately 1200 tweets that appeared on Twitter during the American Societ... Read More
When I worked at a vet hospital people asked me all the time whether dog's mouths were cleaner than humans. I always told them it was an old wive's tale & wondered about their personal hygiene. Turns out I was wrong! Read More
Under a magnification of 200x, and using a lactophenol cotton blue mount fixation technique, this photomicrograph reveals some of the ultrastructural morphology exhibited by a Mucor sp. fungal organism. This image depicts two sporangia, a mature structure, which had ruptured, releasing its conte... Read More
A new genus of beta-Proteobacteria has been isolated from bioreactors treating oxalate wastes that are produced by Bayer refining of bauxite into alumina. The bacteria are indigenous to the alumina refinery environment and are capable of removing up to 40 tonnes of oxalate wastes produced on sit... Read More
Basidiobolus haptosporus. One subspherical spore which has been produced by replication and one adhesive spore produced by replication Read More
Colonies of Histoplasma capsulatum growning on blood agar plates. Incubated at 30C. Note glabrous colonies without aerial mycelium Read More
Ahh Rabies, we meet again.
When I worked in vet medicine, it was amongst the few diseases that everyone - doctors, clients, support staff, human law enforcement officers, etc. - knew & feared. Maybe it was it's nearly undefeated record & lethal reputation that drove such caution. After all,... Read More
Corynebacterium diphtheriae. Elek plates showing lines of identity. Paper strip is saturated with antitoxin organisms (black growth) producing toxin Read More
Marburg hemorrhagic fever (Marburg HF) is a rare, severe type of hemorrhagic fever which affects both humans and non-human primates. Caused by a genetically unique zoonotic (that is, animal-borne) RNA virus of the filovirus family, its recognition led to the creation of this virus family. The fi... Read More
A dying pelican crawls away from the surf to die on the beach of Paita, Peru on May 2, 2012. According to Peruvian vice minister of Environment, Gabriel Quijandria, the cause of death of thousands of fish, sea birds and diverse animal wildlife that has been washing ashore in the northern coasts ... Read More
Large (about 5 mm in diameter), lactose positive colonies of Klebsiella pneumoniae on desoxycholate-citrate agar. Cultivation 37°C, 24 hours.
Klebsiella pneumoniae is a common source of hospital-acquired infections. Some of the strains can carry plasmids that harbour genes conferring resistan... Read More
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
This scanning electron micrograph (SEM) depicts a number of Leptospira sp. bacteria atop a 0.1. µm polycarbonate filter.
Leptospira interrogans causes leptospirosis, a usually mild febrile illness that may result in liver or kidney failure. Leptospira is a flexible, spiral-shaped, Gram-negati... Read More
The presence of a pellicle on the surface of a broth medium. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
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