An infection is the detrimental colonization of a host organism by a foreign parasite species. Infecting organisms seeks to utilize the host'sresources to multiply, usually at the expense of the host. The infecting organism, or pathogen, interferes with the normal functioning of the host and can lead to chronic wounds, gangrene, loss of an infected limb, and even death. The immune system of mammalian hosts reacts to infections with an innate response, often involving inflammation, followed by an adaptive response. Colloquially, a pathogen is usually considered a microscopic organism though the definition is broader, including macroparasites, fungi, viruses, prions, bacteria, and viroids. Asymbiosis between parasite and host, whereby the relationship is beneficial for the former but detrimental to the latter, is characterised asparasitism. The branch of medicine that focuses on infections and pathogens is infectious disease. "When infection attacks the body,anti-infective drugs can help turn the tide of battle. Four types of anti-infective or drugs exist: antibacterial (antibiotic), antiviral, antitubercular, and antifungal.

Chronic Fatigue Syndrome Not Linked To Virus

Researchers examined blood samples from 147 people diagnosed with chronic fatigue syndrome and 146 healthy subjects. The researchers found no traces of the viruses previously linked to chronic fatigue syndrome in either group.

Alabama's Segregation For Inmates With HIV Faces Court Scrutiny

The American Civil Liberties Union sued Alabama in 2011 for what the group contends is a discriminatory practice that prevents most HIV-positive inmates from participating in rehabilitation and retraining programs important for their success after prison.

Neti Pots Linked To Deadly Brain Infections: CDC

While potentially dangerous organisms are destroyed by stomach acids if you drink tap water, forcing it into your sinuses is another story, since your nose doesn't have anything in the way of an acidic defense.

US Cases Of West Nile Virus Set Record, Deaths Rise: CDC

Through last week, 1,118 cases of West Nile virus and 41 deaths had been reported. The updated figures represent a 40 percent increase in the number of cases and a 61 percent spike in the number of deaths, but are short of the all-time record for a full year: 9,862 cases and 264 deaths in 2003.

Alarming Levels Of Drug-Resistant TB Found Worldwide

In a large international study published in the Lancet medical journal on Thursday, researchers found rates of both multi drug-resistant TB (MDR-TB) and extensively drug-resistant TB (XDR-TB) were higher than previously thought and were threatening global efforts to curb the spread of the disease.

Pig Parasite May Help Treat Autoimmune Disorders

One company is developing what it hopes will be the first in a new class of treatments for autoimmune conditions. Each dose of the drug consists of thousands of microscopic parasite eggs, culled from pig feces, suspended in a tablespoon of saline solution to be swallowed.

Tattoo Infections Linked To Manufacturers' Ink

In New York, there were several cases of infection with a bug called Mycobacterium chelonae, which caused reddish or purple raised bumps in the areas tattooed with gray. The infection can mimic an allergic reaction and be difficult to treat.

U.S. West Nile Cases, Deaths Jump In Latest Week

The U.S. Centers for Disease Control said on Wednesday that 1,118 cases of West Nile virus infections and 41 deaths had been reported so far this year, up from fewer than 700 cases and 26 deaths just one week ago.

Porn Industry Shuts Down After Syphilis Scare While 1,000 XXX Stars Are Tested

Fears of a syphilis outbreak caused a leading porn industry group to announce a nationwide shutdown of X-rated productions while more than 1,000 performers are tested for the sexually transmitted disease. The potential outbreak has reignited California?s controversial Measure B, a referendum which would mandate the use of condoms on porn shoots inside Los Angeles County.

Infections Among Homeless Could Fuel Wider Epidemics: Study

With an estimated 650,000 homeless people in the United States and around 380,000 in Britain, experts said high levels of infection would not only cause yet more poverty and distress for those without homes, but could also become a wider problem.

Breast Milk Ingredient May Guard Against HIV

Researchers say that higher concentrations of human milk oligosaccharides, or HMO -- a kind of complex carbohydrate that's the third-most abundant ingredient in breast milk -- were associated with protection against HIV transmission to infants.