Activated sludge. Note the bacterial rods and filament within the floc. (5000X) Read More
In the late summer of 1882, a ship called the Triton cruised the chilly seas north of Scotland. As it went, it dredged the sea bed for specimens of unknown creatures, under the guidance of the oceanographer John Murray.
Two of the specimens were strange enough that Murray sent them to his col... Read More
One of the most important procedures in virology is measuring the virus titer – the concentration of viruses in a sample. A widely used approach for determining the quantity of infectious virus is the plaque assay. In this technique, the spread of progeny viruses released by individually infecte... Read More
In the latest analysis of packaged leafy greens, Consumer Reports found that nearly 40 percent of samples tested contained bacteria consistent with poor sanitation and fecal contamination.
Leafy greens have been under particular scrutiny since late 2009, when the Center for Science in the Pu... Read More
A major British medical journal on Tuesday retracted a flawed study linking the measles, mumps and rubella vaccine to autism and bowel disease.
The retraction by The Lancet comes a day after a competing medical journal, BMJ, issued an embargoed commentary calling for The Lancet to formally re... Read More
There is now so much unused swine flu vaccine in the world that rich nations, including the United States, are trying to get rid of their surpluses. But the world’s poorest countries — a few still facing the brunt of the pandemic — are receiving very little of it.
Of the 95 countries that to... Read More
Feed contaminated by salmonella bacteria is a familiar and costly problem for the animal feed industry all over the world. Some types of salmonella have succeeded in establishing themselves in feed and fish meal factories and have persisted there for several years because it has proved impossibl... Read More
A common plant virus lures aphids to infected plants by making the plants more attractive, but when the insects taste the plant, they quickly leave for tastier, healthier ones. In the process, the insects rapidly transmit the disease, according to Penn State entomologists.
"The virus improves... Read More
Varicella. Vesicle smear from case of chicken pox. Direct fluorescent antibody (FA) staining readily differentiates chicken pox or zoster lesions from those due to Herpes simplex viru Read More
Researchers at Uppsala University and the Swedish University of Agricultural Sciences (SLU) have found several genes that lead to increased risk for an SLE-like autoimmune disorder in dogs. This is the first time scientists have found genes behind such a complex disease.
The study is being pu... Read More
Researchers at National Jewish Health have discovered how the virulent food-borne bacteria Listeria monocytogenes induces infected immune cells to sabotage their own defensive response. The studies offer insight into host-pathogen interactions and suggest potential therapeutic targets for food p... Read More
Scientists who study how organisms reproduce know that asexual reproduction is more efficient — for one thing, it’s about twice as fast as sexual reproduction, since every offspring can produce more.
But if the asexual way is so efficient, why do almost all animal species reproduce sexually, ... Read More
A nonprofit organization is paying the Food and Drug Administration to help develop a better vaccine against pneumococcal disease in poor countries.
In the last decade, such vaccines have sharply decreased hospitalizations for the disease in the United States. The bacteria, Streptococcus pneu... Read More
Symbiosis: bacteria and higher organisms.Video on how a bioluminescent marine bacterium called Vibrio fischeri colonizes a specific tissue of Euprymna scolopes, a small Hawaiian squid. Discussion by Karen L. Visick, Ph.D., Department of Microbiology and Immunology, Loyola Medical Center. Read More
Wine lovers will delight in this guest blog post on Small Things Considered and adaptation from an article in the January 2010 issue of Wines and Vines by John Ingraham, a retired UC Davis Professor of Microbiology, on how he and his colleagues tamed the "capricious and independent" cycle of mal... Read More
Networks of interconnected pores in the shells of the Savannah River National Laboratory’s Porous Walled Hollow Glass Microspheres give the tiny “microballoons” unique capabilities for potential use in targeted drug delivery, hydrogen storage and other uses.
Hollow glass microspheres have be... Read More
No vaccine currently exists for West Nile Virus, but a new therapeutic made from tobacco plants has been shown to arrest the infection, according to a new study.
Elderly individuals and those with depressed immunity are particularly vulnerable to West Nile, a mosquito-borne illness that can c... Read More
At least 50 per cent of antibiotic use in hospitals is inappropriate, according to a new report from the national Health Protection Surveillance Centre (HPSC) which yesterday published guidelines on proper antimicrobial stewardship in hospitals in Ireland.
The report warns that in addition to... Read More
Medical researchers use laboratory-grown human cells to learn the intricacies of how cells work and test theories about the causes and treatment of diseases. The cell lines they need are “immortal”—they can grow indefinitely, be frozen for decades, divided into different batches and shared among... Read More