Parasites Flashcards
a specialized branch of
ecology
Parasitology
study of organisms living within a specialized environment
Parasitology
- usually not obligatory
- reflects a relationship in which one species of organism benefits and the other neither benefits nor is harmed
Commensalism
- relationship in which one species of organism lives on or with another organism
- living at the the expense of and often causing harm to the host
Parasitism
study of parasites and hosts interaction
Parasitology
living organisms that are associated with food for all or part of their life cycle
Parasites
organisms providing food for parasites
Hosts
Parasitology involves…..
◼ Biology of parasites
◼ Variation of life cycles among parasites
◼ Methods of invasion
◼ Migration and maturation within the hosts
◼ Effect of parasites upon the hosts
◼ Host reactions and responses
◼ Methods of escape from the hosts
◼ Distribution of the parasites
Types of Parasites
Endoparasite
Ectoparasite
Facultative parasite
Accidental parasite
Identify Types of Parasites
- lives inside the host
Endoparasite
Identify Types of Parasites
- lives on or in the skin
Ectoparasite
Identify Types of Parasites
- free-living organism
that can become parasitic if it is accidentally ingested or enters a wound or other body opening.
Facultative parasite
Identify Types of Parasites
- normally live in or on
a host other than humans, and these
parasites do not survive long in an unnatural
human host
Accidental parasite
Types of Host
Definitive host
Intermediate host
Transport host
Reservoir host
Identify the types of host
- one in which the parasite reaches sexual or reproductive maturity.
Definitive host
Identify the types of host
- harbors a parasite
that does not reproduce but merely goes on to infect a new host
Transport host
Identify the types of host
- harbors parasites that engage in asexual reproduction
Intermediate host
Identify the types of host
- harbor a parasite that
is also infective for humans.
Reservoir host
Classification of Parasites
Protozoans
Metazoans
Arthropods
Identify Classification of Parasites
- microscopic one-celled
organisms that are categorized according to their method of movements
Protozoans
Protozoans classified according to motility
Ciliates - uses cilia
Flagellates - uses flagella
Amoeba - no movement
Identify Classification of Parasites
- multicellular worm-like
invertebrates
Metazoans
Examples of Metazoans
Helminths
◼ Cestodes (flatworms)
◼ Nematodes (roundworms)
◼ Trematodes (flukes)
Identify Classification of Parasites
- possess a hard exoskeleton and jointed appendages
Arthropods
