Now, researchers comparing American, Pacific and Southeast Asian subtypes of the virus in PLOS Neglected Tropical Diseases have concluded that the American-subtype strain has the highest ability to grow both in vitro and in vivo.
The new research, led by paleontologist Karen Moreno and geologist Mario Pino from Austral University in Chile, was published last week in PLOS One. Other significant footprints in the Americas include 14,600-year-old tracks at the nearby Monte Verde, and a pair of trackways in Mexico dating back to 10,700 years ago and 7,200 years ago.
The surprise discovery of a previously unknown, 42.6-million-year-old quadrupedal whale along the coast of Peru has resulted in an important addendum to this story: Ancient whales made South America, and not North America, their first home in the New World.
Madariaga virus (MADV), or South American eastern equine encephalitis virus (EEEV), has -- until now -- been found primarily in animals of South and Central America, with the first human outbreak occurring in Panama in 2010.
According to Tábita Hünemeier, a geneticist at the University of São Paulo's Bioscience Institute (IB-USP) who took part in the research, "one of the main results of the study was the identification of Luzia's people as genetically related to the Clovis culture, which dismantles the idea of two biological components and the possibility that there were two migrations to the Americas, one with African traits and the other with Asian traits."
By sequencing and analyzing 15 ancient genomes found throughout the Americas—six of which were older than 10,000 years—these researchers determined that, around 8,000 years ago, the ancestors of Native Americans were still on the move, migrating away from Mesoamerica (what is today Mexico and Central America) toward both North and South America.
A collaborative group of researchers from The University of Texas Medical Branch at Galveston and the Faculty of Medicine of Sao Jose do Rio in Brazil is the first to report that wild monkeys in the Americas are transmitting the Zika virus to humans via mosquitoes, making complete eradication of the virus in the Americas very unlikely.
Because these spearpoints pre-date Clovis culture, they may have inspired the development of subsequent projectile point styles, including those made by the Clovis people, said Michael Waters, the lead author of the new study and an archaeologist at Texas A&M University.
By collecting DNA from the guts of these bugs, researchers reporting in PLOS Neglected Tropical Diseases have described patterns in the behavior of the bugs, the strain of parasite, and the communities of microbes that interact with the parasite.
These two states, the most heavily populated in Brazil, had been free of yellow fever for nearly 70 years. Research by scientists at the Institut Pasteur and the Institut Oswaldo Cruz has demonstrated that the yellow fever virus can be transmitted via Aedes albopictus, the tiger mosquito.
In 2012, by comparison, not a single state had an adult obesity rate over 35 percent. It should be clarified that the difference between the national and state rates cited in the report comes down to how data is collected.