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In the group of viruses that includes dengue and chikungunya, a newcomer now has people talking about it. Showing almost the same symptoms as its two dreaded cousins, did zika pass unnoticed by the researchers? The result: many cases were due to the zika virus. The latter infected the inhabitants of Libreville with the same frequency as by the dengue or chikungunya viruses. Therefore, the capital actually experienced a concomitant epidemic of dengue, chikungunya, and zika in 2007. Additionally, analysis of the phylogenetic tree of the zika viruses detected in Libreville confirms that it was a strain belonging to the old African line. An emerging threat to human health The researchers also re-analysed the mosquitoes captured in 2007. These studies attested to the first known presence of zika in Aedes albopictus, better known as the tiger mosquito.
Dengue fever -- caused by a virus transmitted by mosquitoes -- threatens 2.5 billion people each year and there is no vaccine or treatment. New research by Michigan State University entomologists has found that a bacterium can stop dengue viruses from replicating in the mosquitoes.
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Source: www.sciencedaily.com
"The mosquito species we study is subtropical, and at warmer temperatures the larvae develop faster," Morin explained. Conversely, the south-central U.S. will see fewer mosquito days due to less rain during summer and early fall.
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Source: www.sciencedaily.com
Since it was first seen in New York in 1999, West Nile virus has reached across the country and shown few signs of abating. Last year, the U.S. Centers for Disease Control had the highest number of reported cases -- 5,387, including 243 deaths -- since 2003.
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Source: www.sciencedaily.com
Metacognition refers to the awareness of ones knowledge in different areas. The more comprehensive and accurate this metacognitive knowledge, the better one is able to reflect about his or her own actions and behaviors.