Download Parasitiology | CLS 355 - Mycology and Parasitology Lab and more Quizzes Biology in PDF only on Docsity!
commensalism
association of two different species in which one partner is benefitted and the other is neither benefitted nor injured TERM 2
Parasitism
DEFINITION 2 association of two different species in which one (parasite) is benefitted and the other (host) is injured to some degree TERM 3
Obligatory Parasite
DEFINITION 3 cannot live apart from the host TERM 4
Facultative parasite
DEFINITION 4 capable of both free-living or commensal existence, and may become parasitic TERM 5
Ectoparasite
DEFINITION 5 established on exterior surface of the host
Endoparasite
established within the body TERM 7
Host
DEFINITION 7 species which harbors a parasite and provides soem metabolic resources to the parasitic species TERM 8
Definitive Host
DEFINITION 8 host in which parasite passes its adult existence or sexual reproductive phase TERM 9
Intermediate Host
DEFINITION 9 host in which parasite passes its larval (immature) stage or asexual reproductive phase; required part of the life cycle of that parasite TERM 10
Incidental Host
DEFINITION 10 Host other than normal host species which is accidentally infected; the parasite may or may not continue full development in this host
Pseudoparasite
artifact object which resembles a parasite form but is either not a parasite at all or not parasitic in the host under consideration TERM 17
Protozoa
DEFINITION 17 unicellular eukaryotic microorganisms Amebas Flagellates Ciliates Hemoflagelates Sprozoa and Coccidia TERM 18
Amebas
DEFINITION 18 pseudopodia TERM 19
Flagellates
DEFINITION 19 flagella TERM 20
Ciliates
DEFINITION 20 Cilia
Hemoflagelates
flagella, blood and tissue protozoa TERM 22
Helminths
DEFINITION 22 metazoa; worm like invertebrates Nematodes Filariae Cestoda Trematoda TERM 23
Nematodes
DEFINITION 23 INTESTINAL roundworms TERM 24
Filariae
DEFINITION 24 TISSUE roundworms TERM 25
Cestoda
DEFINITION 25 tapeworms (SEGMENTED flatworms)
General Characteristics of Parasitic Disease
most common in warm climates social and economic conditions affect distribution Parasites with simple life cycles are more wide-spread Degree of injury depends upon number, size, activity, and location of parasites in the host Clinical Manifestations general and variable diagnosis requires laboratory detection and identification TERM 32
Diagnostic form
DEFINITION 32 seen in the laboratoy TERM 33
Trophozoite
DEFINITION 33 Protozoa active, vegetative form TERM 34
Cyst
DEFINITION 34 Protozoa inactive, resistant, infectious form TERM 35
Adult
DEFINITION 35 Helminth mature stage
Ovum (ova)
Helminth eggs TERM 37
Fecal Specimens
DEFINITION 37 Naturally Passed stool preferred No contamination with urine, mineral oil, or Xray contrast media 1 or 2 specimens usually sufficient for detection of helminth ova 3 specimens collected every other day usually sufficient for detection of protozoa Should be transported to laboratory ASAP unless in appropriate preservatives (namely formalin and PVA) TERM 38
Formalin
DEFINITION 38 10% (v/v) aqueous formaldehyde Feces:formalin ration 1: Wet mounts only TERM 39
Polyvinyl alcohol
DEFINITION 39 PVA the best! feces:PVA ration 1:3 permanent smears only TERM 40
Sodium acetate-acetic acid-formalin
DEFINITION 40 (SAF) Permanent smears and concentration methods
Sedimentation
Formalin-ethyl acetate centrifugation More labor intensive, but best overall recovery
