Taenia sollum (though smaller than T. seginata) another long, thin,
flat and segmented worm that parasites the human intestine, commonly referred
to as the pork tape worm. It also causes taeniasis and cysticercosis.
flat and segmented worm that parasites the human intestine, commonly referred
to as the pork tape worm. It also causes taeniasis and cysticercosis.
Geographical Distribution
World – wide but commonly
found in areas in which raw or boiled meat is consumed, such as Africa, western
Europe, North and South America, china, India, etc.
found in areas in which raw or boiled meat is consumed, such as Africa, western
Europe, North and South America, china, India, etc.
Morphology
Teania solium is smaller
than taenia seginate. It measures about 2m or more with less than 1,000
segments (proglothides). The scolex which is cuboid in shape, possesses 4
muscular sucker and a projection at the anterior and known as the rostellum
bearing two row of 22 – 32 unequal hooks. These structure serves as the organs
of attachment.
than taenia seginate. It measures about 2m or more with less than 1,000
segments (proglothides). The scolex which is cuboid in shape, possesses 4
muscular sucker and a projection at the anterior and known as the rostellum
bearing two row of 22 – 32 unequal hooks. These structure serves as the organs
of attachment.
Behind the scolex is the
neck which is unsegmented and containing the immature proglottides that are
broader than the length. The strobila has about 800 – 900 proglothides that are almost square in
shape, with less than 13 uterric branches (7 – 10, 3 – 12, etc)
neck which is unsegmented and containing the immature proglottides that are
broader than the length. The strobila has about 800 – 900 proglothides that are almost square in
shape, with less than 13 uterric branches (7 – 10, 3 – 12, etc)
Life cycle
An infected person expels
the gravid segment containing numerous spherically shaped eggs measuring 35 –
42u via stool
the gravid segment containing numerous spherically shaped eggs measuring 35 –
42u via stool
When ingested by the pig,
the little six hooked embryo are set free and penetrate the intestinal wall and
enters the blood or lymph channels where they are transported to the tongue,
neck hearth, elbow and shoulder muscles or other sites that are suitable for
their growth.
the little six hooked embryo are set free and penetrate the intestinal wall and
enters the blood or lymph channels where they are transported to the tongue,
neck hearth, elbow and shoulder muscles or other sites that are suitable for
their growth.
In these areas they grow into a bladder worm (known as
cysticercus cellulosae or measly) and surrounded by a straw coloured fluid and
about 6 – 8 mm in length. It may remain viable for 3 – 6 years
cysticercus cellulosae or measly) and surrounded by a straw coloured fluid and
about 6 – 8 mm in length. It may remain viable for 3 – 6 years
When ingested by man, it
envagenates in the small intestine releasing the scolex with which it attaches
itself to the intestinal mucosa, growing into an adult in 2 – 3 months. If
untreated, it may survive up to 15 years
envagenates in the small intestine releasing the scolex with which it attaches
itself to the intestinal mucosa, growing into an adult in 2 – 3 months. If
untreated, it may survive up to 15 years
The infection with the egg
or larva is known as cysticercosis. This occurs when man and other intermediate
host ingest the eggs directly or accidentally (i.e. anti-infection) or by
anti-paristali – where a patient develops reverse paristalis i.e. during nausea
and vomiting eggs already released in the intestine are swept upwards into the
duodenum where they hatch to liberate the larva which penetrate the intestinal
wall and are encysted in the muscles and associated organs causing the
infection
or larva is known as cysticercosis. This occurs when man and other intermediate
host ingest the eggs directly or accidentally (i.e. anti-infection) or by
anti-paristali – where a patient develops reverse paristalis i.e. during nausea
and vomiting eggs already released in the intestine are swept upwards into the
duodenum where they hatch to liberate the larva which penetrate the intestinal
wall and are encysted in the muscles and associated organs causing the
infection
Prevention/control
i.
Sanitary disposal of excreta through adequate
latrine accommodation
ii.
Adequate cooking of pork meat
iii.
Regular anti-mortem and post-mortem inspection
of meat
iv.
Health education on mode of transmission
v.
Use of drugs