In human, sugar is very important
to biological process since it is a general form which is absorbed by cells.
Inside our body, the sugar is obtained by the chemical process at mouth from
carbohydrate. By reacting the enzyme with it, chemically speaking, it cracks
the bonding and produces the sugar. And the sugar itself is cracked into
several small compound i.e. glucose.
This mechanism becomes key
factors in increasing the body of the fish. The recent study shows that plants
which can produce polysaccharides are reported to able in replacing medical
treatments for fish. They are important in balancing the closed-system of
ecology and playing crucial role. Erlong Wang of Department of Basic
Veterinary, College of Veterinary Medicine, Sichuan Agricultural University investigated
the plants polysaccharides which are Ficus
farica, Radix isatidis and Schisandra
chinensis in preventing and controlling microbes in aquaculture. They used
the plants as additional vitamins contained in the feed for crucian carp in
resisting the disease caused by Aeromonas
hydrophila.
The bacteria are native warm
climate and they can survive either in aerobic or anaerobic ecosystem. This ability
helps them to live in fresh or even worst quality of water such as brakish
water. Interestingly, Aeromonas
hydrophila is reported to digest gelatin and hemoglobin. As a result, they
can survive from most general antibiotics and cold temperatures. This bacterium
is the main enemy for fish farmers in near-equator countries. For example,
consuming fish in Indonesia, the catfish are vulnerable against this bacterium
and providing continued issue in fish cultivation. The bacterium causes many
symptoms and one of those is physical wound in the fins and body.
The researchers use the plant in
a form of dry powers through the extractions conducted by Yang et al and
selected immunological parameters. They are the phagocytosis assay, serum
bactericidal activity and lysozyme activity, detecting of serum total protein
including complement C3 and SOD activity, and surviving test against the Aeromonas hydrophila. The results showed
significant changes in immune system of the carp. The fish increased the
leukocyte of phagocytosis during the 21 days fed by the food which is added
with the extraction of those three plants. Surprisingly, the plants were able
to help the carp in surviving against the bacterium and the amount of the fish
which are able to withstand against the bacteria for more than half. It means,
the death of the fish in infected ecosystem decreased for 50% in overall.
In conclusion, this method can be
considered as organic medical treatments since the feed is added from the
plants. And the capability of preventing from the bacteria is obtained by
increasing the phagocytosis level for instance.
Tags
The Sciences