Sentences with phrase «infects human populations»

However, the idea that XMRV also infects human populations has been met with skepticism.

What matters is that 20 years from now, virtually every dog in Megasaki City is sick with a disease that's threatening to cross the species threshold and infect the human population.

Not exact matches

The researchers believe that HIV - 1 was introduced into the human population when hunters became exposed to infected blood.»

These include the infant with galactosemia, 53,54 the infant whose mother uses illegal drugs, 55 the infant whose mother has untreated active tuberculosis, and the infant in the United States whose mother has been infected with the human immunodeficiency virus.56, 57 In countries with populations at increased risk for other infectious diseases and nutritional deficiencies resulting in infant death, the mortality risks associated with not breastfeeding may outweigh the possible risks of acquiring human immunodeficiency virus infection.58 Although most prescribed and over-the-counter medications are safe for the breastfed infant, there are a few medications that mothers may need to take that may make it necessary to interrupt breastfeeding temporarily.

A high percentage of the human population is infected with the herpes simplex virus and carries the virus in a latent state.

Another great example is tuberculosis among elephants moving through populations now that the fences have come down around parks in South Africa and moving through human and domestic animal populations that are infected with tuberculosis or who could be infected with tuberculosis.

In due course, mosquitoes bit infected monkeys and transmitted yellow fever right back to the human population there.

Even in Africa, at the heart of the pandemic, in Malawi, 21 percent of MSM are infected with the virus compared with 11 percent of the general population, whereas Zambia's rates are 33 percent versus 15 percent, respectively, says Chris Beyrer, director of the Johns Hopkins Center of Public Health and Human Rights.

The new virus can then spread to humans, rapidly infecting the population since few people are immune, with devastating results.

Toxoplasma — or toxo as it is informally known — is one of the most common human parasites in the world, infecting between 30 and 60 per cent of the global population.

Conservation work to defeat the disease has including removing infected individuals from the population and new research in Evolutionary Applications explains how this gives us a unique opportunity to understand how human selection alters the evolution of cancerous cells.

West Nile virus has wreaked havoc mostly on bird populations, but humans and a variety of other animals can become infected as well when bitten by a mosquito that previously dined on an infected bird.

The work began, according to Balloux, when the pair decided to combine their data sets on human populations and pathogens to see if they could determine «when Helicobacter pylori first infected humans and [if this could] shed light on when and how anatomically modern humans colonized the world.»

Thus rabies does not persist in human populations because people do not bite each other even when they are infected and, in practice, in Europe, people catch the virus mainly from foxes, although contact with them is rare.

Much of his work investigates assembly of the cytoskeleton and replication of the human pathogen Toxoplasma gondii, which infects an estimated one - quarter of the world population.

But with no evidence of a large asymptomatic population so far, Kellam and his colleagues favor a second scenario: MERS evolved and diversified in animals and then infected humans on multiple occasions.

The model suggests that outbreaks are more likely in urban areas with higher human and mosquito population densities, in years with longer growing seasons, when infected travelers arrive early in the growing season, and when tiger mosquitos have fewer non-human hosts that result in wasted bites.

«It certainly doesn't take much for a virus that is perfectly adapted to infect humans to spread provided the conditions are ideal — and in the case of Zika it found a population that had never seen the virus before and so had no immunity to it, and also a bountiful supply of the insect that it needs to spread.

If widely implemented, such vaccines may have a significant impact on improving the quality and length of life for HIV - infected individuals, while at the same time reducing the rate at which HIV continues to spread throughout the human population.1

It's a post-apocalyptic world where a huge proportion of the population have been infected by a plague turning them into forever wandering, blood thirsty, undead creatures; some still have a little human left inside them, while others (known as Boneys) are skeletal creatures devoted to eating anything and everything with a heartbeat.

In addition to harboring diseases that affect humans, such as ringworm, distemper, toxoplasmosis, leptospirosis and rabies, infected pets have the potential to transmit diseases into wild populations of animals.

Equine influenza viruses do not infect humans, dogs or other animals, although an equine influenza virus mutated to infect dogs approximately 15 years ago and is now circulating as a low - pathogenicity canine influenza virus in the dog population, mostly infecting dogs in shelter environments.

Without keeping track of how the cats are doing and what changes are occurring in the colony, the cat population can easily grow out of control again or a sick cat can infect the community creating both human and animal health risks.

Potential impacts of climate change on the transmission of Lyme disease include: 1) changes in the geographic distribution of the disease due to the increase in favorable habitat for ticks to survive off their hosts; 85 2) a lengthened transmission season due to earlier onset of higher temperatures in the spring and later onset of cold and frost; 3) higher tick densities leading to greater risk in areas where the disease is currently observed, due to milder winters and potentially larger rodent host populations; and 4) changes in human behaviors, including increased time outdoors, which may increase the risk of exposure to infected ticks.