Parasitology Flashcards
(160 cards)
Parasites may be simple unicellular _____ or complex multicellular ____
protozoa
metazoa
Branches of parasitology
-Protozoology: the study of ___
-Helminthology: the study of ____ (worms)
-Entomology: science that deals with ____
Protozoa
helminths; worms
arthropods
Important Definitions
-Zoonosis: “a __________”
-Definitive host: “is one in which the ____ occurs or the _____ is present”
-Intermediate host: “is one in which the _____ occurs or the ___ is present.”
disease of an animal which infects man
sexual cycle
adult
asexual cycle
larva
PROTOZOA
-Protozoa are __karyotes
Eu
Protozoa.
Lack a nucleus
Have intracellular organelles
Similar to bacteria
Unicellular
Mobile
Difficult to see under microscope
Exist in One stage
F(have nucleus)
T
F(very different from bacteria)
T
T
F(easily seen)
F(2)
Phases of Protozoa
_____
_____
Trophozoites
Cysts
Trophozoites
_______ form
(Vulnerable or resistant?) to environmental conditions
Cysts
(Less or More?) durable form
Often present in feces ,water ,new infection
Feeding
Vulnerable
More
CLASSIFICATION OF PROTOZOA
There are multiple ways of classifying protozoa;
-Based on ______
-Based on ______
-Based on ______
site of infection
mode of locomotion
pathogenicity
CLASSIFICATION OF PROTOZOA
According to degree of pathogenicity, protozoa can be categorized into
- _____
-______
-_____
According types of organs for locomotion
-______-____
-______-____
-______-____
-_____-____
According to site of infection
-______
-______
-________
Pathogenic
Non-pathogenic (commensals)
Opportunistic
Amoebae - pseudopodia
Flagellates - flagella
Ciliates - cilia
Sporozoa - absence of locomotion.
Intestinal
Urogenital
Blood and Tissue
Medical parasitology: the ______
study and medical implications of parasites that infect humans
ENTOMOLOGY – science that deals with ______
arthropods
Not All parasitic organisms are eukaryotes
T/F
F
Definitive host: “the organism in which the __________________
Intermediate host: “the organism in which the ______________
adult or sexually mature stage of the parasite lives”
parasite lives during a period of its development only”
Zoonosis: “a disease __________
of an animal which infects man”
Parasites form part of the animal kingdom which comprises some _____ identified species categorized into ___ phyla (but it is estimated that there may be ~10m species in total
800,000
33
According to their celluar structure, parasites are classified into 2 sub-kingdoms:
________ and ———-
protozoa (unicellular) and metazoa (multicellular)
Protozoan (unicellular) parasites
are classified according to ______ and _______
Most species that cause human disease belong to the phylums _______ and _____
morphology and means of locomotion.
sarcomastigophora and apicomplexa
Metazoa (multicellular)
Is classified According to ______
site of infection
According to degree of pathogenicity, protozoa can be categorized into
(I)_______
(2)_______
(3)_____
pathogenic
Non-pathogenic (commensals)
opportunistic
4 types according types of organs for locomotion
Amoebae - ______;
Flagellates - ______;
Ciliates - ______ and
Sporozoa – ___________
pseudopodia
flagella
cilia
absence of locomototion.
Parasitic helminths, or worms of humans, belong to two phyla: _______(———) and _______(——-)
Nematoda (roundworms) and Platyhelminthes (flatworms).
Platyhelminthes are subdivided into 2 classes: _______(——) and _______(——-)
Trematoda (flukes) and Cestoda (tapeworms)
Protozoa is divided into 3
List them
Sarcomastigophora
Apicomplexa
Ciliophora
Microsporidia
Sarcomastigophora is divided into 2 sub phylums
List them
Sarcodina
Mastigophora
