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Parisitology
UA Exam 4- nematodoes, cestodes, parasites
29
Other
Undergraduate 3
06/14/2012

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Term

- changes in eating habits

-NAFTA

- Expanded international trade

-Influx of refugees

-AIDS/ Immunocompromised hosts

Definition
Changes in prevalance of Parasites
Term
changes in eating habits that causes a greater prevalence of parasites includes
Definition
Ingesting of fish
Term

- means "living together"

-The association of two species, primarily for the purpose of obtaining food on the part of one or both members of the group

- may also involve protection or other advantages

Definition
symbiosis
Term

-symbiotic relationship in which one organism, the host, is to some degree harmed through the activities of the other organism, the parasite.

-requires close and prolonged contact

Definition
parasitism
Term

-means "eating from the same table"

-symbiotic association that is advantageous to one partner at least and not disadvantageous to the other

Definition
commensalism
Term

commensal relationship that is beneficial to both organisms

 

Definition
Mutualism
Term
organism cannot survive in any manner other than parasitism
Definition
Obligate parasite
Term

-may exist in a free-living state or as a commensal and that, if the opportunity presents itself, may become parasitic

-does not, of necessity, have to be a parasite at any stage of its existence

Definition
Facultative parasite
Term
parasites that live within the host
Definition
endoparasites
Term
parasites that are found on the surface of the body
Definition
ectoparasites
Term
Blood sucking arthropods that lead an independent existence except for occasional nutritional forays
Definition
micropredators
Term
host in which the parasite reaches sexual maturity or the host in which sexual reproduction occurs
Definition
definitive host
Term
transport host, one in which the parasite does not undergo any development, but remains infective to another host
Definition
paratenic host
Term
any animal that harbors an infection that can be transmitted to humans
Definition
reservoir host
Term

-any living carrier that transports a pathogenic microorganism from an infected to a non-infected host

-it may transmit the disease passively(mechanical) or be an essential host in the life cycle of the organism (biologic)

Definition
Vector
Term
one of the effects of the parasite on the host is that it that it interferes with __________ of the host through the action of parasite ________
Definition

-vital processes

-excretions

Term
One of the effects of the parasite on the host is invasion and destruction of the ____________ that does not cause gross physical damage
Definition
host tissue
Term
The reasons parasites do not cause gross physical damage to the tissue are?
Definition

-their size

-their ability to penetrate mucosal tissue

-numbers (larger numbers can cause significant damage)

Term
An effect of the parasite on the host is __________ of essential substances from the host resulting in conditions such as _______ and ________
Definition

-deprivation

-anemia

-B12 deficiency

Term
genetic makeup of the host is effected by the parasite by
Definition
racial variations in resistance
Term

-eosinophil production

-Ab production

-Inflimmation (cell mediated) immunity

Definition
Immune response to the Host by the parasite
Term
The most common clinical manifestation of parasitic infection is
Definition
diarrhea; may be bloody or purulent, accompanied by cramping or abdominal pain
Term
Five common clinical manifestations of parasitic infections
Definition

1. diarrhea

2. peripheral blood eosinophils(15-50%)

3. Hepatosplenomegaly

4.Generalized systemic symptoms

5. Some specific symptoms (some parasites have symptoms specific to them)

Term
Do all parasites elecit a peripheral blood eosinophil response?
Definition
No
Term

-may be accompanied by jaundice

-associated with many organisms capable of inhabiting the liver

Definition
Hepatosplenomegaly
Term

Includes

  • intestinal tract
  • blood
  • lung
  • liver
  • spleen
  • urogenital
  • CNS
  • skin
  • muscle
  • eye
Definition
Specimen sites for recovery of parasites
Term
Name the 5 major subdivisions of parasites
Definition

1.protozoa

2. platyhelminthes

3. Aschelminthes

4. acanthocephala

5. arthropoda

Term
Taxonomy platyhelminthes goes by the common name of
Definition
flatworms
Term
Aschelminthes has the class
Definition
nematoda (roundworms)
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