Worm present in intestine Sucks blood and host becomes anaemic Diarrhoea stomachache Prevention and control Wear shoes and proper disposal of faeces Sanitary habits Wuchereria bancrofti ID: 935892
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Slide1
Ancylostoma duodenale
Commonly called as hook worm
Worm present in intestine
Sucks blood and host becomes
anaemic
Diarrhoea
stomachache
Prevention and control
Wear shoes and proper disposal of
faeces
Sanitary habits
Slide2Wuchereria bancrofti
It is commonly known as ‘
Filaria
worm
’found
in the lymphatic vessels, muscular tissues and glands of man.
The worm is distributed in all tropical, sub tropical and temperate countries and causes
filariasis
.
Intermediate host is a mosquito (
culex
fatigans
).
It feeds on blood and lymph of human beings.
The female
Filaria
gives rise to juveniles called Microfilariae.
When mosquito bites the infected person these juveniles reach the mid gut of the mosquito along with blood.
Slide3Disease: In the severe infection due to repeated inoculation the adult cause blocking of lymphatic system which results in the enlargement of legs, arms, scrotum and mammary glands which is known as
elephantiasis.
It causes filarial fever and headache.
Prevention and control:
the most effective preventive means is to avoid the mosquito bite. Mosquito breeding should also be controlled by all means. No proper drug has been invented to eradicate the
filaria
worms.
Heterazon
and cyanine is effective to a certain extent.
Slide4Dracunculus medinensis
I
t
is also a
commmon
human
nematoda
parasite, known as the “Guinea worm”. The “fiery serpents” which molested the ancient
israelites
of Biblical times are supposed to be the guinea worms.
One of major water borne diseases, transmitted by drinking water containing
cyclops
.
It is found in regions of Africa, Arabia,
pakistan
,
iran
, Turkey,
India,China
, South America,
Guianas
etc.
It grows up to 120cm in length and 1 to 1.7 mm in diameter. The adult worms live under the deeper layers of skin especially that of the arms, shoulders and legs of their helpless human victims and look like a much coiled varicose vein.
Slide5Disease: The infection of guinea worm causes itching,
diarrhoea
, nausea, vomiting
eosinophilia
due to the toxic secretions of the parasite in the body.
Prevention and control: T
he drug for the treatment of infection is the injection of
phenothial
zinc emulsified in the olive green.
Slide6Enterobius vermicularis
Commonly known as ‘
pin worm
’ most common parasite f man.
It is cosmopolitan and more common in
america
, Europe, Africa and
C
anada.
It is an intestinal parasite but also found in the appendix ,
caecum
and the
neighbouring
parts of the intestine.
Disease:
infection causes restlessness, nervousness, appendicitis, hysteria and inflammation of mucous membrane.
Prevention and control:
Good sanitary habits have control on the
reinfection
of worms. Most effective drug is
piperazine
to control the infection.
Slide7Trichinella spiralis
Trichinella
spiralis
or “
trichinia
worm” is another dreaded nematode parasite of man causing the serious disease trichinosis.
Commonly found in Europe, United States and Arctic regions.
Parasite inhabits the intestine of man, pig, rats, and other vertebrates.
Male and female measure 1.4 to 1.6 mm and 3 to 4 mm in length, respectively.
Adults lie buried in the mucosa of the
host.In
humans cysts undergo calcification and larva may die.
Slide8Disease: Trichinosis.
The symptoms of the disease are
diarrhoea
, nausea, abdominal pain, muscular pain etc.
Man usually receives infection by eating partly cooked pork containing very minute cysts.
Prevention and control:
There is no effective known treatment, but once the larva have become encysted and calcified in the muscles, most symptoms slowly reduce.
Consumption of properly –cooked pork and all pork products protective against the parasite.
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