Foto: 2006
Prof. Frank Hadley Collins, Dir., Cntr. for Global Health and Infectious Diseases, Univ. of Notre Dame
This 2006 photograph depicted a female Aedes aegypti mosquito while she was in the process of acquiring a blood meal from her human host, who in this instance, was actually the biomedical photographer, James Gathany, here at the Centers for Disease Control. You’ll note the feeding apparatus consisting of a sharp, orange-colored “fascicle”, which while not feeding, is covered in a soft, pliant sheath called the "labellum”, which retracts as the sharp stylets contained within pierce the host's skin surface, as the insect obtains its blood meal. The orange color of the fascicle is due to the red color of the blood as it migrates up the thin, sharp translucent tube.
The first reported epidemics of Dengue (DF) and dengue hemorrhagic fever (DHF) occurred in 1779-1780 in Asia, Africa, and North America. The near simultaneous occurrence of outbreaks on three continents indicates that these viruses and their mosquito vector have had a worldwide distribution in the tropics for more than 200 years. During most of this time, DF was considered a mild, nonfatal disease of visitors to the tropics. Generally, there were long intervals (10-40 years) between major epidemics, mainly because the introduction of a new serotype in a susceptible population occurred only if viruses and their mosquito vector, primarily the Aedes aegypti mosquito, could survive the slow transport between population centers by sailing vessels.
Ministerul Sănătății a primit luni confirmarea infectării cu virusul Zika în cazul unei tinere de 27 de ani, a anunțat purtătorul de cuvânt al MS, Laurențiu Colintineanu.
„Ieri, Ministerul Sănătății a primit confirmarea cu virusul Zika a unei persoane de 27 de ani. Ea călătorise în Martinica. Este în afara pericolului. Este vorba despre o fată. Nu s-a infectat pe teritoriul României. Riscul de transmitere pe teritoriul României este minim”, a declarat, marți, Colintineanu.
CONSTANȚA: Din 21 septembrie, insulele ecologice digitalizate devin operaționale. Autoritățile locale au organizat o întâlnire de informare cu reprezentanții asociațiilor de proprietari
Primăria Municipiului Constanța a organizat ieri o întâlnire de informare cu reprezentanții asociațiilor de proprietari cu privire la modul de...
