GENERAL PARASITOLOGY (LEC 1) Flashcards
area of biology concerned with the phenomenon of dependence of one living organism on another
Parasitology
deals with parasites which infect man, the diseases they produce, the response generated by him against them and various methods of diagnosis and prevention
Clinical (Medical) Parasitology
an organism that is entirely dependent on another organism (host) for all or part of its life cycle and metabolic requirements.
Parasites
examples of Microparasites
Bacteria, Protozoans, Viruses
2 types of Parasites
Microparasites and Macroparasites
What are the types of Helminths?
Roundworms, Flukes, Tapeworms, Thorny-headed worms
generally infects the bile ducts, liver, or blood
Flukes (trematodes)
can cause infection in the intestines or the body
Roundworms (nematodes)
mainly infects animals, rarely can infect humans
Thorny-headed worms
Classification of Parasites according to LOCATION
Ectoparasites and Endoparasites
Ectoparasite causes what disease?
Infestation
lives on the surface of the skin/temporarily invade superficial tissues of the host
Ectoparasites
Examples of Ectoparasites
* Mites
Mesostigamata
Prostigamata
Astigmata
Not all parasites cause disease/infection. True or False
True
Although the presence of parasites signify that there’s no problem in sanitation of people. There is no actual public health concern.
False
refers to a part of parasite that shows the segments with a strobila
Proglottids
Head of the parasite
Scolex
Segmented part of parasite
Strobila
stages of HELMINTHS
egg-larva-adult
stages of PROTOZOANS
Most: cysts-trophozoites
Some: has young trophozoites, mature trophozoites, gametocytes
Examples of Ectoparasites
*Mosquitoes
Anopheles spp.
Aedes spp.
Culex spp.
Mansonia spp.
Where is the sex organ of the mosquito found?
Antenae
Which is more harmful, a female mosquito or a male mosquito
Female - nangangagat because it needs blood (reproduce)
Male mosquitoes’ antenae structure
Thick bushy
Female mosquitoes’ antenae structure
Thin, bushy
Male cockroach
Small bumps on the underside of their abdomen
Female Cockroach
Abdomen, although not visible, ovipositor
Young parasite’s morphology is completely different from adult
Complete Metamorphosis
Young cockroach
Nymph
Mature cockroach
Adult
Examples of Ectoparasites
*Ticks (Metastigmata)
Argasidae
Ixodidae
parasites that live within the host
Endoparasites
Endoparasites causes what type of disease
Infection
All protozoans and helminths are endoparasites
True
organisms that under favorable circumstances may live either parasitic or free-living existence
Facultative parasite
organisms that attack an unusual host
Accidental parasites
organisms that attack a host where they cannot live or develop further
Aberrant parasites
non-parasitic stages of existence which are lived independently of a host
Free living Parasites
Remains on or in the body of the host for its entire life
Permanent parasites
Examples of Macroparasites
Helminths
small, unicellular; multiplies within vertebrate host
Microparasites