Biology Questions and Answers
humans the Trypanosoma cruzi multiply
as amastigote fmuscle tissue or in the nervous tissueorm in the cardiac (^)
forming pseudocysts. These
pseudocystsparasites into the circulation break releasing and theflagellate
cycle is repeated.
- What is the incubation
period of an infection?
Incubation period is the time interval
between the infection by an agent thatcauses disease and the first signs or
symptoms of the disease.
- What is the average
incubation period of Chagas’
disease? What are some signs
and symptoms of the acute
phase of Chagas’ disease?
Chagas’ present an acute pdisease may or may hase. When it isnot (^)
present, the to 14 days. Tincubation phe chronic phase, however,eriod is about 5 (^)
can manifest in more than 10 years
after the infection.
At the site where the trypanosoma has
penetrated becomes swelledthe skin or : This sigthe mucosan is known as (^)
chagoma. Another sign that may appear
in up to 20% ois the Romana’s sigf cases aften, a swr the infectionelling of one
of the eyelids when infection took place
through the ocular route. In the acuteChagas’ disease fever, malaise,
inflammation and enlargement of lymph
nodes may occur. In more severe cases
fatal inflammation of the cardiac muscle
or of the meninges may happen.
- In the long term which are
the organs affected by chronic
Chagas’ disease?
In the chronic phase of Chagas’ disease,
that mathe trypanifestsnosoma in years after fests the muscles ofthe infection,
the heart causing insufficient blood
pumping, pulmonary eincrease in the size of the organdema and
(cardiomegaly). This is thmanifestation of Chagas’ disease. Te cardiac (^) he
main symptoms that appear are
dyspnea, couarrhythmias.gh and cardiac
In the digestive form of manifestationthe disease the parasite destroys cells of
of the autonomic nervous system
responsible fdigestive tube. Since tor the peristaltismhe motility of the of the (^)
esophagus and intestines is reduced the
transit of materialsis impaired and they increase i inside these organsn size
(width), conditions respectively known
as megaesophamain symptomsgus and megacolo are dysphagia n. The
(impaired swallowing), constipation,
flatulence and formatio(accumulation of feces inside n of fecalomathe
bowels).
- What is prophylaxis?
Prophylaxisprevent diseases. For example, are measures taken tothe use (^)
of condoms in sexual relations is a
prophylaxis against contamination by
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