The life cycle of Blastocystis is still not
completely understood [2]. Hosts are infected from
cysts via a fecal-oral route, such as consumption of
contaminated food and water or from practicing
poor hygiene. After ingestion, the cyst develops
into a vacuolar form, which can asexually reproduce
by binary fission, or may change to an amoeboid
or granular form, or may form a cyst in the host’s
intestinal lumen. Information on the transitions
from the amoeboid to vacuolar form, and from
vacuolar to cyst form is however, not clearly
understood [21]. A cyst which is formed in the
intestine is surrounded by a thick fibrillar layer,
which is subsequently expelled when passing to an
external environment, as shown in Figure 1. The
excreted cyst is resistant to environmental exposure,
and can thus contaminate water or food, causing
subsequent Blastocystis infection via fecal-oral route
[22-24]. Transmission can occur from human to
human, human to animal or animal to human
The life cycle of Blastocystis is still notcompletely understood [2]. Hosts are infected fromcysts via a fecal-oral route, such as consumption ofcontaminated food and water or from practicingpoor hygiene. After ingestion, the cyst developsinto a vacuolar form, which can asexually reproduceby binary fission, or may change to an amoeboidor granular form, or may form a cyst in the host’sintestinal lumen. Information on the transitionsfrom the amoeboid to vacuolar form, and fromvacuolar to cyst form is however, not clearlyunderstood [21]. A cyst which is formed in theintestine is surrounded by a thick fibrillar layer,which is subsequently expelled when passing to anexternal environment, as shown in Figure 1. Theexcreted cyst is resistant to environmental exposure,and can thus contaminate water or food, causingsubsequent Blastocystis infection via fecal-oral route[22-24]. Transmission can occur from human tohuman, human to animal or animal to human
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