Organic Name Reactions for the students and aspirants of Chemistry12th.pptx
Life cycle of protozoan parasites
1. LIFE CYCLE OF PROTOZOAN
FISH PARASITES
Shoriful Islam(ASH1602006M)
Bipul Chandra Das (ASH1602034M)
Md. Rony Kazi (ASH1602047M)
Humayra Amin (BKH1602052F)
Shanto Datta (ASH1602059M)
2. Parasite: Are those organisms which cling to relatively large animals externally or
internally for food & completion of their life cycle.
Protozoan parasites of fish: Those microscopic,unicellular,free living parasites that
undergo protozoa phylum & attack on or in fish body.
General Characteristics:
Locomotory organs: Pseudopodia or flagella
or cilia.
Nutrition: Holozoic, Holophytic ,Saprozoic or
parasitic
Reproduction: Sexual or asexual.
May be ectoparasitic or endoparasitic.
3. Protozoan parasites types according to
attacking sites of fish body
Ectoparasites
Lives on external surface of fish body
Found on skin,gills & fins.
Commonly found ectoparasites are:
a. Ichthyophthirius multifiliis
b. Cryptocaryon irritans
c. Chilodonella uncinate
d. Ichthyobodo salmonis etc.
Endoparasites
Lives on internal surface of fish body
Found on intestine , visceral cavity of fish
Commonly found endoparasires are:
a. Spironucleus salmonicida
b. Hexamita muris
c. Eimeria falciformis
d. Goussia carpelli etc.
6. Effects & Prevention control
Effects:
Affected on skin,gills & fins [Freshwater species]
Epidermal tissue changes & formation of epithelial ulcers.
Causes minutes white spots & form nodule.
Fish show irritation & restless.
Prevention & control:
Prevention of exposure of fish to the parasites
Applying quarantine method.
Formalin 160-250 ppm for 1 hour daily(dip bath)
KMnO4 01% for 30-45 seconds
NaCl 7000-20000 ppm
8. Effects & Prevention control
Effects:
Affected on skin,gills & fins [Marine water species]
Ragged fins,cloudy eyes,pale gills.
Increase mucus production.
Irregular in skin colour
Breath more rapidly
Prevention & control:
fish should be placed in a quarantine tank for at least 2-3 weeks to make sure
they are eating.
maintaining water quality, correct nutrition, stable temparature, and meeting
habitat requirement.
Copper solution medication are effective.
10. Effects & Prevention control
Effects:
Especially invade on salmonid fish.
Create fowl smelling.
Pus-filled absesses in muscles & internal organ.
Prevention & control:
Elimination of stress and improvement of husbandry will help correct an
outbreak of spironucleosis.
Apply quarantine method for prevention.
Metronidazole can be administered in feed at a dosage of 50 mg/kg body weight
(or 10 mg/g feed) for 5 consecutive days.
Make water changes (70–100%) each day before re-dosing.
12. Effects & Prevention control
Effects:
Invade the intestine of fish
Resulrs diarrhea,weight loss & dehydration.
Significant damage to the intestine epithelial layer.
Release of blood fluid & electrolytes into the intestine.
Prevention & control:
Water parameter should be maintained accurately.
Apply quarantine method.
The antidiarrhoeic drug may be used.