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100 trillion good bacteria call human body home

In the search for new life, scientists have studied the depths of the ocean and the lips of steaming volcanoes. They've looked on Mars and the moons of Jupiter, and even planets beyond this solar system.

Dr. David Relman went searching inside his own mouth. On a routine dental visit in 1998, ... Read More

Norton Zinder, 1928-2012

Norton Zinder made two important discoveries in the field of virology. While a Ph.D. student with Joshua Lederberg at the University of Wisconsin-Madison he found that viruses of bacteria (bacteriophages) could move genes from one host to another, a process called transduction. Later in his own ... Read More

HIV and TB at the White House (photo)

Photo taken by Joshua Yospyn for WJLA TV at the We Can End AIDS march in Washington, D.C. Read More

The Rise of Genomic Superspreaders

One hundred million years ago the earth’s climate was much warmer than today and vast inland seas stretched across entire continents. The land was dominated by charismatic megafauna that would one day serve as inspiration for Sir Arthur Conan Doyle’s novel The Lost World. This period is commonly... Read More

Replication of immunodeficiency virus in humans

The acquired immunodeficiency syndrome (AIDS) pandemic is caused by the human immunodeficiency virus (HIV-1), which attacks the immune system and leaves infected individuals susceptible to opportunistic infections. AIDS and HIV-1 are thought to have a relatively short history in humans, with the... Read More

London prepares for Olympian disease-monitoring task

As the world’s athletes limber up for the forthcoming Olympic games in London, infectious-disease experts are preparing for their own trials. Their competition is with the diseases that millions of athletes, officials, media and spectators bring with them as they converge from across the globe o... Read More

Yankee ‘invaders’ threaten UK’s crayfish

Better resistance to parasites and a less fussy diet are allowing aggressive signal crayfish from the US to threaten white-clawed crayfish native to Yorkshire.

The Yorkshire crayfish suffers from two parasites: plague, which is carried by the American invader, and porcelain disease that makes... Read More

How hosts recognize bacteria

We are surrounded by bacteria, viruses, fungi and parasites. The fact that we nevertheless do not fall prey to infections is thanks to certain cellular sensor molecules such as toll-like receptors (TLR), which recognize the molecular structure of pathogens and intercede by ensuring an often comp... Read More

What Happened to Our Friendly Enterococci?

Enterococci had been generally regarded as benign commensals, a part of our healthy intestinal microbiota. They were even invited in, being used as probiotics. But then, in the late 1970s, the first multiple drug-resistant strains appeared, and vancomycin-resistant strains followed in 1981. In r... Read More

Bacterial Vaginosis Is Associated with Higher Risk of Female-to-Male Transmission of HIV

An investigation led by UCSF has found that the risk of female-to-male HIV transmission is increased three fold for women with bacterial vaginosis, a common disorder in which the normal balance of bacteria in the vagina is disrupted.

The new research assessed the association between bacterial... Read More

Bacteria outbreak in Northern Europe due to ocean warming, study says

Manmade climate change is the main driver behind the unexpected emergence of a group of bacteria in northern Europe which can cause gastroenteritis, new research by a group of international experts shows.

The paper, published in the journal Nature Climate Change on Sunday, provided some of th... Read More

Mind-controlling virus forces parasitic wasp to put all its eggs in one basket

In a French meadow, a creature that specialises in corrupting the bodies of other animals is getting a taste of its own medicine.
Leptopilina boulardi is a wasp that lays its eggs in fly maggots. When the wasp grub hatches, it devours its host form the inside out, eventually bursting out of its... Read More

Princeton University researchers develop tooth attachment that detects bacteria

It may not be the latest style in bovine bling, but researchers at Princeton University say a golden tattoo attached to a cow’s tooth could one day tell you something about your health.

The remote sensing device has the ability to detect a single bacterium, and to demonstrate, scientists at P... Read More

Vorticella

A single Vorticella species. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

HPV Vaccine Reduces Infection, Even in Unvaccinated: Evidence of 'Herd' Protection

The HPV vaccine not only has resulted in a decrease in human papillomavirus infection in immunized teens but also in teens who were not immunized.

The study is believed to be the first to show a substantial decrease in HPV infection in a community setting as well as herd protection -- a decre... Read More

Do Bacteria Have Built-In Cell Death Mechanisms?

Cell death, also known as apoptosis, is a significant part of normal animal development. However, the question arises whether bacteria, similar to higher organisms, have a built-in mechanism that determines when the cells die.

Researchers at the Hadassah Medical School of the Hebrew Universi... Read More

Bird Flu Research That Stoked Fears Is Published

The more controversial of two papers describing how the lethal H5N1 bird flu could be made easier to spread was published on Thursday, six months after a scientific advisory board suggested that the papers’ most potentially dangerous data be censored.

The paper’s publication, in the journal S... Read More

Can India remain polio-free?

India has been free of polio for over one year. This is a remarkable accomplishment, considering that just 30 years ago the country recorded 200,000 cases of the disease annually, or one every three minutes. With polio endemic in two neighboring countries, Pakistan and Afghanistan, and in the mo... Read More

Selection-driven Gene Loss in Bacteria

Bacterial genomes differ dramatically in size: from 140Kb to 13Mb (those numbers might be off now...please let me know if something has broken the record. Yes, I know the lower estimate can change based on semantics, but there are a bunch in that range). Although we have some clues as to how sel... Read More

New probiotic bacteria shows promise for use in shellfish aquaculture

The use of probiotic bacteria, isolated from naturally-occurring bacterial communities, is gaining in popularity in the aquaculture industry as the preferred, environmentally-friendly management alternative to the use of antibiotics and other antimicrobials for disease prevention. Known to the p... Read More

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