Study of parasite

11. DEFINITIONS
 PARASITE:
Living organism which lives in or upon and at the expense of
another living organism.
 SAPROPHYTE
Living organisms who derive their nourishment from dead
material.

12.  DEFINITIVE HOST (Primary host)
It is the host which harbors the adult stage of
parasite or where the parasite utilizes the sexual
method of reproduction
 INTERMEDIATE HOST (Secondary host)
It is the host which harbors the larval stage of the
parasite or where the parasite utilizes the asexual
method of reproduction

13.  INFECTION:
Parasite establishes itself within the host
 INFESTATION
When the parasite lives on the surface of the host

14. PARASITOLOGY
PROTOZOOLOGY
HELMINTHOLOGY

15. PROTOZOA
 Rhizopoda
1. Entamoeba Histolytica
2. Endolimax nana
3. Iodoamoeba Butschii
4. Dientamoeba fragilis
 Sporozoa
1. Plasmodium
2. Toxoplasma
 Mastigophora
1. Giardia lamblia
2. Trichomonas
3. Leishmania
4. Trypanosome
 Ciliata
1. Balantidium Coli

20. Protozoology
ENTAMOEBA HISTOLYTICA

21. PROTOZOA



22. PROTOZOA
 isthestructurethat is abletofeed, growandmove. Butit can
lose itsabilityinunfavorable conditions,.
 arehardorthickwalls, resistanttoadverse conditions, non-
nutritiousandnon-growingforms

23. 1. Cystic
2. Non cystic (vegetative/trophozoite)

24. WHO definition “Amoebiasis”
 Harboring the parasite Entamoeba histolytica
Entamoeba
histolytica
Intestinal Extra
Liver
Without
signs
Clinical

25. Epidemiology

26. habitat

28. Reservoir of infection

29. Epidemiological factors
Host factors
 Age
 Gender
 Household infections
 Food handlers
Environmental factors
 Poor sanitation
 Night soil as fertilizers
 Human defecation in fields
 Sewage contamination
 Floods
 Heavy rains

33. Clinical presentation

34. MODE OF TRANSMISSION
1. FEACO – ORAL ROUTE
2. VECTOR TRANSMISSION
3. Sexual route
 INCUBATION PERIOD
2 – 4 WEEKS

35. Carrier of antamoeba histolytica

37. PREVENTION & CONTROL

38. Any Question ?