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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

Phormidium with Sytox Green

Cyanobacteria (Phormidium) with the vital stain Sytox Green. These cells are dead (green). White arrow shows other bacteria living in association with the cyanobacteria. Read More

Gram-positive Enterococcus sp. bacteria

This digitally-colorized scanning electron micrograph (SEM) depicted large numbers of Gram-positive Enterococcus sp. bacteria.
“Enterococci, leading causes of nosocomial bacteremia, surgical wound infection, and urinary tract infection, are becoming resistant to many and sometimes all standard ... Read More

Treponema pallidum bacteria

An electron photomicrograph of two spiral-shaped Treponema pallidum bacteria.

Here we see two Treponema pallidum bacteria scanned by an electron microscope, magnified 36,000X. T. pallidum is the causative agent of syphilis. It contains one of the smallest prokaryotic genomes consisting of abo... Read More

Malarial Parasite as a trophozoite

This diagrams, as a trophozoite, the various forms that the developing malarial parasite undergoes prior to its schizont stage.

As the parasite increases in size, the ring morphology of the early trophozoite disappears, and becomes what is referred to as a mature trophozoite, which undergoes ... Read More

CAMP test of Group-B streptococci

If the laboratory is not able to identify group-B streptococci (GBS) by the Lancefield grouping procedure, there are other microbiologic tests that can be used to identify GBS. This picture shows one of these tests. It is called the CAMP test. CAMP is an acronym for the authors of this test (Chr... Read More

Measles Viron

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

Rubella virus virions

This negatively-stained transmission electron micrograph (TEM) revealed the presence of Rubella virus virions, as they were in the process of budding from the host cell surface to be freed into the host’s system, thereby, producing an enveloped virus particle, which means that after budding, the... Read More

ASM at the AAAS Meeting in Washington, D.C.

Staff members Garth, Lindsay and Jim at the American Society for Microbiology booth at the American Association for the Advancement of Science meeting in Washington, D.C.

If you happen to be at the meeting today, please stop by and introduce yourself. Read More

Science Comedian Brian Malow at #AAAS

Brian Malow at the Social Media Soiree party during the American Association for the Advancement of Science meeting in Washington, D.C.

Malow was featured in one of the first MicrobeWorld Video episodes about 3 years ago.

Cut and paste this link - http://bit.ly/gTniHl - into your address b... Read More

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