A. MAWIA
, A vector is an organism that transmits or
carries a disease from one human to another
or from one animal to another.
Therefore a vector simply is a carrier of
disease.
These disease-causing organisms may undergo
some physiological development of their life
cycle while they are within the vector.
The developmental changes that the organism
undergoes while within the host are called
extrinsic incubation period.
,Factors that affect the distribution of vector borne
diseases are:
Meteorological factors: certain climatic conditions
such as rainfall or high temperatures may favour the
breeding of certain vectors.
Human factors: Certain human behaviours have
predisposed them to high infection rates thus causing
epidemics, for example nomadic migrations to areas of
high vector concentrations.
Socio economic factors: poor living conditions favour
the presence of certain vectors such as Pediculosis which
is a vector for relapsing fever.
Vulnerability factors: change in vulnerability levels,
such as malnutrition and HIV/AIDS; have shown a sudden
increase in vector borne diseases in the affected
populations.
, The main principles of vector control are:
Reducing the reservoir host,
Controlling the vector population,
Protecting the susceptible host.
Four main ways of vector control:
Targeting the adult vector using Insecticides;
Targeting the larvae stage using larvicides;
Preventing the breeding of the vector through
environmental interventions;
Protecting the susceptible hosts.
, A vector is an organism that transmits or
carries a disease from one human to another
or from one animal to another.
Therefore a vector simply is a carrier of
disease.
These disease-causing organisms may undergo
some physiological development of their life
cycle while they are within the vector.
The developmental changes that the organism
undergoes while within the host are called
extrinsic incubation period.
,Factors that affect the distribution of vector borne
diseases are:
Meteorological factors: certain climatic conditions
such as rainfall or high temperatures may favour the
breeding of certain vectors.
Human factors: Certain human behaviours have
predisposed them to high infection rates thus causing
epidemics, for example nomadic migrations to areas of
high vector concentrations.
Socio economic factors: poor living conditions favour
the presence of certain vectors such as Pediculosis which
is a vector for relapsing fever.
Vulnerability factors: change in vulnerability levels,
such as malnutrition and HIV/AIDS; have shown a sudden
increase in vector borne diseases in the affected
populations.
, The main principles of vector control are:
Reducing the reservoir host,
Controlling the vector population,
Protecting the susceptible host.
Four main ways of vector control:
Targeting the adult vector using Insecticides;
Targeting the larvae stage using larvicides;
Preventing the breeding of the vector through
environmental interventions;
Protecting the susceptible hosts.
