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Dengue Fever; Evaluation of Adverse Events |
Coxsackievirus Infections; Infections, Viral; Roseola | |
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Viral infections continue to be a big threat to human Some diseases have been effectively controlled with the help of modern technology Yet diseases such as H5N1 avian flu dengue virus
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some arbovirus infections notably dengue and yellow fever can be maintained indefinitely by human to human mosquito transmission although both have animal reservoir hosts also Epidemiologic Features of Viral Infections
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Typhoid is a life threatening bacterial infection that is spread through contaminated food and water In Asia it is particularly
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some arbovirus infections notably dengue and yellow fever can be maintained indefinitely by human to human mosquito transmission although both have animal reservoir hosts also Epidemiologic Features of Viral Infections Some epidemiologically important features of viral diseases of man are set out in Table 48 6 The control of these infections requires
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FIRST THE CHICKENS Now sushi For the moment at least bird flu the H5N1 avian influenza virus subtype and related less deadly strains
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Dengue is of four subtypes and unlike other viral infections where one develops an immunity for the disease after one infection infection of one subtype does not render immunity for the
Mosquito
For some reason IT didn t bite me <u><b>Mosquito< b>< u> <i>From Wikipedia the free encyclopedia < i> Mosquitoes family Culicidae They have a pair of scaled wings a pair of halteres a slender body and long legs The females of most mosquito species suck blood hematophagy from other animals which has made them the most deadly disease vectors known killing millions of people over thousands of years and continuing to kill millions per year by the spread of diseases Length varies but is rarely greater than 16 mm 0 6 inch and weight up to 2 5 mg 0 04 grain A mosquito can fly for 1 to 4 hours continuously at up to 1 2 km h travelling up to 10 km in a night Most species are nocturnal or crepuscular dawn or dusk feeders During the heat of the day most mosquitoes rest in a cool place and wait for the evenings They may still bite if disturbed Mosquitos are adept at infiltration and have been known to find their way into homes via deactivated air conditioning units <b>Feeding habits< b> Both male and female mosquitoes are nectar feeders but the female of many species is also capable of haematophagy drinking blood Females do not require blood for survival but they do need supplemental substances like protein and iron to develop eggs Prior to and during blood feeding they inject saliva The Toxorhynchites species of mosquito never drink blood 6 This genus includes the largest of the extant mosquitoes the larvae of which are predatory on the larvae of other mosquitoes These mosquito eaters have been used in the past as mosquito control agents with varying success 7 Female mosquitoes hunt their blood host by detecting carbon dioxide CO2 and 1 octen 3 ol from a distance <b>Mosquito Saliva< b> In order for a mosquito to obtain a blood meal it must surmount the vertebrate physiological responses The mosquito as with all blood feeding arthropods has evolved mechanisms to effectively block the hemostasis system with their sal
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