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The Effect Of Mosquito On Man
[A CASE STUDY OF SOME SELECTED AREAS IN OVIA NORT EAST LOCAL GOVERNMENT AREA OF EDO STATE]
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CHAPTER ONE
INTRODUCTION
1.1 BACKGROUND OF THE STUDY
Globally,
mosquitoes without questioned the most important of the insects. At
present time over 200 million people in over a hundred and subtropical
countries of the world live under the threat of mosquito. According to
world Health Organization (WHO) it is estimated that mosquito causes or
contributes to the deaths of between one and three million people each
year, mostly children under five years of age. Generally, in science,
the study of insects (Etomology) cannot be competed without the broad
heading.
MOSQUITOES
Mosquitos play a very important role in any
scientific discipline. It is noticeable, however, that an initiative
insight into the nature and life circle of any scientific organism only
comes to those who have a sound basic of observation and scientific
discipline behind them for one to be successful in study of mosquitoes
and its effects on man a special attention has to be paid on the study
if its habits and life circle. Since special consideration is given to
the environment in which these species of organism dwells, its role and
mode of breeding should also be considered as these affect the life span
of man.
In view of the above differences and diversity, this work
will be limited to the study of mosquitoes and its effects on man. Many
of mankind’s idealist enemes are found among the 85,000 species of
stagnant and mosquitoes in “older dipteral†south largest of the insects
groups. Most members of the order have a single pair of wings, hence
the name diptera, meaning two lunged, most of them, just like the
mosquitoes also posses tubular mouths which can piece the human skin for
nourishing blood. The loss of blood is small, but as the insect is
sipping, virus and other pathogens may pass from the insects into the
human host. Sickness such as malaria, yellow fever, elephantiasis is
transmitted through this ways.
There are about fifty species of the
family, culiacdac many them are called Gnats,. They are thin flies with
long fragile legs and narrow wings. Only the female how ever pieces the
skins of mammals and suck blood the male defer from the female in having
long pulps and feather like analenae. In Ovia North East local
government in particular and Nigeria in general, there are currently
three species of mosquitoes all of which are potential malaria,
elephantiasis and yellow fever transmitters. The spotted gnat (Anopheles
maculipennis) is an example of the type of mosquitoes the rest with its
abdomen raised at an angle and it head in line with the rest of the
body. It has spotted wings and one sub-species (athroparus) which breeds
in blackish water in coastal district. The common gnat (anlex pipien)
is a very abundant mosquitoes near stagnant water and a type which rest
with its abdomen parallel with the surface oni which its is resting and
it head lowered at an angle. Aedes albopictus is one of the largest and
fiercest mosquitoes. It has spotted wings and white ringed legs and
body. The females attack man and other mammals literate in building,
something and rests in the same position and has a very similar life
history to that of a common gnat.
The mosquitoes as a member of the
“orde†diptera has no posterior pair of wings but the posterior pair is
represented only a pair of small club shaped structures, the halters.
These look useless, but this cannot fly without them. A fly with its
halters cut off can still beat its wings at the normal frequency and
through the normal angle, but it lose control in the air, it a straight
course and aliable to fall on its back. These halteres have an important
function in the control of flight.
1.2 STATEMENT OF PROBLEMS
Accurate
figures has shown that the mortality (death rate) of human being
increases rapidly and again, there is an indication that the breeding
rate of certain insects like mosquitoes is increasing geometrically too.
T he entomology of insects, mosquitoes to be precise shows that most of
the death of human being are caused as a result of the diseases
transmitted by these vectors to their hosts. An insight of such diseases
transmitted by the vectors are malaria caused by the females anopheles
mosquitoes, yellow fever, caused by creoles mosquitoes. The transmission
of the diseases I normally through the blood stream which contaminate
the pure blood, resulting in acute sickness that are characterized by
many symptoms such as sever fever, headache, vomiting, tiredness,
dizziness loss of appetite which may finally result to death.
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ABSRACT - [ Total Page(s): 1 ]The significance and effects of mosquito on man can never be overemphasized. No human being or other primates can live without good health, as the “adage†says that health is wealth. The aim of this study is to find out or reveal the effect of mosquito on man. It is also to create awareness to the society on the danger of mosquito, especially Ovia North East local government area of Edo State.Four selected villages were used for this study. In each of the village’s four hundre ... Continue reading---
