[Elizabeth_Zeibig]_Clinical_Parasitology__A_Practi(z-lib.org)

APPENDIX A
Glossary
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concentration technique (pl., techniques)
Process that provides the ability to detect small
numbers of parasites that might not be detected
using a direct wet preparation. It is carried out
by performing a debris removal process that
forces parasites present to congregate (concentrate)
together through several centrifugation
steps. Wet preparations, preferably saline and
iodine, are then made from the concentrated
specimen for microscopic examination.
concentrate wet preparation (pl., preparations)
Slide made by mixing a small portion
of specimen with saline or iodine after a
debris removal process and subsequent examination
of the resultant mixture under the
microscope.
confuser (pl., confusers) A microscopic structure
or form that resembles a parasite; may also be
referred to as an artifact or a pseudoparasite.
congenital transmission Passage of disease from
mother to unborn child.
copepod (pl., copepods) Water flea that resides
in freshwater sources such as streams and wells;
also known as Cyclops spp. Serves as the intermediate
host in the life cycle of select helminths
such as Dracunculus.
copulation Sexual union or mating of certain helminths,
including the nematodes.
copulatory bursa Umbrella-like structure at the
posterior end of adult male nematodes that aids
in copulation.
coracidium Ciliated larval stage of Diphyllobothrium
latum; consists of a hexacanth embryo that
develops from the egg stage and hatches when
the egg is exposed to fresh water.
corticated Presence of an outer, mammillated
albuminous coating; commonly seen on Ascaris
eggs.
costa Rodlike structure located at the base of the
undulating membrane, between the undulating
membrane and the body of certain flagellate
trophozoites, thus connecting the two structures.
It may also aid in supporting the undulating
membrane.
cutaneous An infection localized in the capillaries
of the skin.
cuticle Surface covering present on adult nematodes;
provides protection against destruction by
human stomach acid.
cyst (pl., cysts) Amebic stage characterized by a
thick cell wall that allows for survival of the
organism in the environment and its subsequent
transmission into an uninfected host.
cysticercoid larval stage Scolex surrounded by a
bladder-like cyst that contains little or no fluid
that emerges from the larvae of certain tapeworm
species, such as Hymenolepis nana.
cysticercosis Human tissue infection contracted
by ingestion of Taenia solium eggs that have
been passed in human feces.
cysticercus larva Scolex surrounded by a bladderlike
cyst that is thin-walled and filled with fluid.
It emerges from the larvae of certain tapeworms,
such as Taenia spp.; also known as a bladder
worm.
cytostome Rudimentary mouth.
daughter cyst (pl., daughter cysts) Miniaturized
hydatid cyst complete with cyst wall, layers of
germinal tissue, and fluid-filled bladder; contains
numerous scolices.
decorticated Absence of an outer, mammillated,
albuminous coating.
definitive host (pl., hosts) Host in which the
adult and/or sexual phase of a parasite occurs.
developing trophozoite (pl., trophozoites) Consists
of a number of stages of malarial development
emerging from the ring form, characterized
by an increased presence of parasites that take
up more space within the red blood cell. Remnants
of the ring may be visible.
diagnostic stage Stage in the parasitic life cycle
that can be identified by examining appropriate
specimens from the host.
Digenea A name for the class of parasites that
includes the flukes.
dioecious Refers to parasites that reproduce via
separate sexes.
direct wet mount (pl., mounts) A slide made by
mixing a small portion of unfixed stool with
saline or iodine and subsequent examination of
the resultant mixture under the microscope to
detect the presence of motile protozoan trophozoites;
also known as a direct wet preparation.
direct wet preparation (pl., preparations) A
slide made by mixing a small portion of unfixed
stool with saline or iodine and subsequent
examination of the resultant mixture under the
microscope to detect the presence of motile
protozoan trophozoites; also known as a direct
wet mount.
distomiasis General term for (human) infection
with flukes.