DISEASE VECTOR
DISEASE VECTOR
CONTENT
Vectorsarelivingorganismsthatcantransmitinfectiouspathogensbetweenhumans,orfromanimalstohumans.Often,onceavectorbecomesinfectious,theyarecapableoftransmittingthepathogenfortherestoftheirlife.
Vector is an organism that does not cause disease itself but which spreads infection by conveying pathogens from one host to another, for example, mosquito can not have malaria but serve as vectors for the deadly disease called Malaria.
Diseasevectorisanyagentwhichcarriesandtransmitsdiseasesintoanotherlivingorganism.The agents causing diseases are called pathogens.
DISEASES THAT VECTORS CARRY.
. Viruses
.Bacteria
. spirochetes
.Fungi
. Protozoa
. Worms
VIRUSES
Viruses are the smallest particles of living things ever found. They can only be seen by the highest powerful microscope.
RICKETTSIA
Rickettsia are slightly Langer than viruses and are cylindrical in shape.
BACTERIA
Bacteria are of three shapes. Those spherical shaped are called bacilli, and those spiral shaped are called spiriliae
FUNGI
Fungi grow on damp spots of the body e.g between the toes, armpit, in the groin e.t.c
PROTOZOA
Protozoa are the largest forms of microbes and difficult to deal with by the body defence system.
WORMS
Worms are parasites which infect the alimentary canal and tissues of human beings and animals.
SOME VECTORS AGENTS ARE
1. Mosquitoes
2. Rats
3. Housefly
4 Tsetse fly
5. Blackflies e.t.c
WAYS OF ENTRY INTO THE BODY
. Through the mouth or nose
. Through the intestine
.Through the skin
MODE OF SPREAD OF DISEASES
. Through droplet
. through Contaminated foods and water
. Through skin Contact
. Through insect / animal bites.
PRECAUTIONAL MEASURE AGAINST PATHOGENS
1.Goodwater drainage
2.Use of insecticides
3. Oil spreading/spraying on drainage prevents mosquitoesfrom breeding
4. Wash hands after using toilet and doing dirty jobs/chores
5. Proper cooking of food
6. Proper food storage
7. Good personal hygiene
8. Eat balanced diet
HOMEWORK
1. List three(3) consequences of contracting diseases on an individual
2. Mention the diseases each of this vectors carry
i. Rat
ii. Mosquitoes
iii. Housefly
iv. Tsetse fly