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An alternate view of amoebae fruiting bodies, with spores and bacteria.

An alternate view of amoebae fruiting bodies, with spores and bacteria. Related Story: Like Humans, Amoebae Pack a Lunch Before They Travel.

Some amoebae do what many people do. Before they travel, they pack a lunch.

In results of a study reported today in the journal Nature, evolutionary ... Read More

Colonies of Bacteria Do Battle - Paenibacillus dendritiformis

Poisons are unleashed when colonies of bacteria get too close, creating a toxic no-man's land in between.

Research by Eshel Ben-Jacob of the University of California, San Diego's, Center for Theoretical Biological Physics, Ben-Jacob of Tel Aviv University, Avraham Be'er of the University of T... Read More

Cyanobacteria Phormidium

Cyanobacteria (Phormidium) with the vital stain Sytox Green. Yellow/green cells are dead. Red is chlorophyll a fluorescence in live cells.

Photo Credit: Barry H. Rosen, USGS

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Escherichia coli showing flagella

This is a colorized transmission electron micrograph of Escherichia coli O157:H7. Transmission electron micrograph of E. coli O157:H7 showing flagella. Pseudoreplica technique.

E. coli O157:H7 was first recognized as a cause of illness in 1982 during an outbreak of severe bloody diarrhea; the... Read More

Scanning electron micrograph of a new genus of beta-Proteobacteria responsible for the degradation of organic oxalate waste produced by Bayer processing

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

Nipah virus virions, related to Hendra virus

This transmission electron micrograph (TEM) depicted a number of Nipah virus virions that had been isolated from a patient's cerebrospinal fluid (CSF) specimen.

Nipah virus is a member of the family Paramyxoviridae, and is related, but not identical to Hendra virus. Nipah virus was initially ... Read More

Mycobacterium tuberculosis culture

This is a close-up of a Mycobacterium tuberculosis culture revealing this organism’s colonial morphology.

Note the colorless rough surface, which are typical morphologic characteristics seen in Mycobacterium tuberculosis colonial growth. Macroscopic examination of colonial growth patterns is ... Read More

Pseudomonas aeruginosa

This colorized version depicts a scanning electron micrograph (SEM) of a number of Pseudomonas aeruginosa bacteria.

Pseudomonas aeruginosa is a gram-negative, rod-shaped, asporogenous, and monoflagellated bacterium that has an incredible nutritional versatility. It is about 1-5 µm in length ... Read More

A single virus particle, or “virion”, of measles virus

This thin-section transmission electron micrograph (TEM) revealed the ultrastructural appearance of a single virus particle, or “virion”, of measles virus. The measles virus is a paramyxovirus, of the genus Morbillivirus. It is 100-200 nm in diameter, with a core of single-stranded RNA, and is c... Read More

Aspergillus sp. organisms

Magnified 562X this photomicrograph, stained using an “Aspergillus” conjugate fluorescent antibody (FA) staining technique, revealed the presence of Aspergillus sp. organisms, in a case of aspergillosis.
What is Aspergillus?

Aspergillus is a fungus (or mold) that is very common in the enviro... Read More

Hartmannella vermiformis as it entraps a Legionella pneumophila bacterium

This electron micrograph depicts an amoeba, Hartmannella vermiformis (orange) as it entraps a Legionella pneumophila bacterium (green) with an extended pseudopod.

After it is ingested, the Legionella pneumophila bacterium can survive as a symbiont within what then becomes its protozoan host. ... Read More

Acinetobacter baumannii

This SEM depicts a couple of clusters of aerobic Gram-negative, non-motile Acinetobacter baumannii bacteria as seen under a magnification of 12,739x.

Members of the genus Acinetobacter are nonmotile rods, 1-1.5µm in diameter, and 1.5-2.5µm in length, becoming spherical in shape while in their... Read More

Human Immunodeficiency Virus (HIV-1)

This scanning electron micrograph revealed the presence of the human immunodeficiency virus (HIV-1), (spherical in appearance), which had been co-cultivated with human lymphocytes. Note the lymphocyte in the lower left, and some of its extended pseudopodia. HIV-1 virions can be seen on the surfa... Read More

Astrobiologists Discover Strange Benthic Microbial Mats in Antarctica

Photosynthetic microbial mats forming large conical structures up to half a meter tall have been discovered by astrobiologists in Lake Untersee, Antarctica. This research is described in an article in the May 2011 issue of the journal Geobiology.

Lake Untersee is located at 71°20'S, 13°45'E i... Read More

Phomopsis Mold

Cultures of a destructive mold called Phomopsis strains that infect both crop and noncrop plants. One of the species of this genus, Phomopsis viticola, cause a plant disease called phomopsis or dead-arm. Usually, infections begin during early growth stages in spring. This affects leaves, fruit, ... Read More

Dermacentor sp. tick

Under a low magnification of 23X, this scanning electron micrograph (SEM) depicted a dorsal view of an unidentified male Dermacentor sp. tick found upon a cat in the suburbs of Decatur, Georgia, which measured approximately 3.5mm from its gnathosoma (i.e., capitulum), which is where its mouthpa... Read More

Mycobacterium tuberculosis bacteria

Under a high magnification of 15549x, this colorized scanning electron micrograph (SEM) depicted some of the ultrastructural details seen in the cell wall configuration of a number of Gram-positive Mycobacterium tuberculosis bacteria. As an obligate aerobic organism M. tuberculosis can only surv... 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

Bacteria, protozoa, and algae from a wild stream

Under a moderately-high magnification of 2500X, this digitally-colorized scanning electron micrograph (SEM) of an untreated water specimen extracted from a wild stream mainly used to control flooding during inclement weather, revealed the presence of unidentified organisms, which included bacter... Read More

Staphylococcus aureus bacteria, MRSA

Recently recognized outbreaks, or clusters of MRSA in community settings have been associated with strains that have some unique microbiologic and genetic properties, compared with the traditional hospital-based MRSA strains, which suggests some biologic properties, e.g., virulence factors like ... Read More

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