Biology Questions and Answers
cells. Hepatitis A often heals naturally
after 4 to 6 weeks.
- What are the modes of
transmission, main signs and
symptoms and treatments of
hepatitis B?
Hepatitis B is a disease caused by a
DNA vir(wounds, sexual rus. The transmission iselations, transfusio by bloodns, (^)
accidents with contaminated material,
etc.). Tdisease is chrohe most common nic, the infected pform of theatient (^)
carries the virus for life and the liver
gradually suffers injuries that can lto cirrhosis or even to hepatic cancer.ead
Another form of the disease is acute,
sometimessimilar to those fulminatinof hepatitis A but morg, with symptomse
severe and sometimes lethal. There are
persons that are asymptomaticof the virus. The level of hepatic injury carriers
is assessed by blood tests of hepatic
enzymes and by hepatic biopsy(extraction of small samples of tissue to (^)
be examinViral replication can bed under the microscope).e estimated
through PCR (polymerase chain
reaction).
- What are the modes of
transmission, main signs and
symptoms and treatments of
hepatitis C?
Hepatitis C is caused by an RNA virus
and transmitted hepatitis B, through wounds, sexthrough blood (likeual (^)
relations, transfusions, accidents with
contaminated material, etc.). The usual
manifestation is chronic and many
people that have the virus areasymptomatic. The liver gradually (^)
undergoes injuries and some patients
evolve to death. Today interferon use is ancirrhosis, hepatic cancer and
attempt to control replication of the
hepatitis C virus. Tdisease is made periodically by hepatiche assessment of the
biopsy and by blood tests of hepatic
enzymes. Viral replicationestimated through PCR (polym can beerase (^)
chain reaction).
- Are there non viral
hepatitides?
Hepatitis is a generic name for
inflammation ofbacterial hepatitides, the liver. T for example, inhere are (^)
example lepstopirosis,by alco and toxichol, me hepatitides, fodicines or r^
inhaled chemical products.
- What are the main human
viral diseases transmitted by
mosquitoes?
The main htransmitted buman viral infectionsy mosquitoes are dengue (^)
fever and yellow fever.
- What is dengue?
Dengue, or dengue fever, is an epidemicdisease in some countries (for example,
in Brazil),is hemorrhagic d and its most dangerous formengue. It is caused by
four different but related viruses, the
reason that it is difficult for an already
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