Parasitology Flashcards
Study of Host-Parasite relationship and of parasites that infect humans
Parasitology
any organism that lives in or on the body
of another organism in order to survive
Parasite
any organism that harbors a parasite
Host
refers to the manner in how a parasite successfully enters a susceptible host.
Mode of Transmission
ingestion, inhalation, breastfeeding, insect bite, and sexual transmission are modes of transmission. True or False
True
disease-causing parasites
CHOICES:
Endoparasites, Eosinophilia, Ectoparasites, Non- pathogenic parasites, Pathogenic parasites
Pathogenic parasites
also known as commensal parasites that do not harm the host
CHOICES:
Endoparasites, Eosinophilia, Ectoparasites, Non- pathogenic parasites, Pathogenic parasites
Non- pathogenic parasites
thrive externally on the host. Ex. Lice and fleas.
CHOICES:
Endoparasites, Eosinophilia, Ectoparasites, Non- pathogenic parasites, Pathogenic parasites
Ectoparasites
parasite found inside the body of an infected host. More problematic and require special specimen preparation
CHOICES:
Endoparasites, Eosinophilia, Ectoparasites, Non- pathogenic parasites, Pathogenic parasites
Endoparasites
refers to the increase in eosinophil counts in blood associated usually with parasitism. Act as cellular protectors against parasites.
CHOICES:
Endoparasites, Eosinophilia, Ectoparasites, Non- pathogenic parasites, Pathogenic parasites
Eosinophilia
It eventually degrade and are passed in the stool in the form of Charcot – Leyden crystals
CHOICES:
Endoparasites, Eosinophilia, Ectoparasites, Non- pathogenic parasites, Pathogenic parasites
Eosinophilia
A close association between two organisms that are permanent wherein one cannot exist independently
Symbiosis
A symbiotic relationship in which one organism benefits and the other is neither harmed nor benefitting (neutral)
CHOICES:
Mutualism, Parasitism, Commensalism
Commensalism
A symbiotic relationship in which one species benefits at the expense of another.
CHOICES:
Mutualism, Parasitism, Commensalism
Parasitism
A symbiotic relationship in which both organisms of different species benefit.
CHOICES:
Mutualism, Parasitism, Commensalism
Mutualism
Cannot survive without a host hence it can’t complete its life cycle without a host
CHOICES:
Temporary Parasite, Accidental/Incidental Parasite, Spurious Parasite, Erratic Parasite, Obligatory Parasite, Facultative Parasite, Permanent Parasite
Obligatory Parasite
may exist in a free-living state or may become parasitic when the need arises
CHOICES:
Temporary Parasite, Accidental/Incidental Parasite, Spurious Parasite, Erratic Parasite, Obligatory Parasite, Facultative Parasite, Permanent Parasite
Facultative Parasite
found in an organ that is not its usual habitat
CHOICES:
Temporary Parasite, Accidental/Incidental Parasite, Spurious Parasite, Erratic Parasite, Obligatory Parasite, Facultative Parasite, Permanent Parasite
Erratic Parasite
Found in a host where it does not ordinarily live
CHOICES:
Temporary Parasite, Accidental/Incidental Parasite, Spurious Parasite, Erratic Parasite, Obligatory Parasite, Facultative Parasite, Permanent Parasite
Accidental/Incidental Parasite
remains on or in the body of the host for its entire life
CHOICES:
Temporary Parasite, Accidental/Incidental Parasite, Spurious Parasite, Erratic Parasite, Obligatory Parasite, Facultative Parasite, Permanent Parasite
Permanent Parasite
lives on the host only for a short period of time
CHOICES:
Temporary Parasite, Accidental/Incidental Parasite, Spurious Parasite, Erratic Parasite, Obligatory Parasite, Facultative Parasite, Permanent Parasite
Temporary Parasite
a free-living organism that passes through the digestive tract without infecting the host
CHOICES:
Temporary Parasite, Accidental/Incidental Parasite, Spurious Parasite, Erratic Parasite, Obligatory Parasite, Facultative Parasite, Permanent Parasite
Spurious Parasite
Where parasite attains sexual maturity
Definitive/Final
It harbors the asexual or larval stage of the parasite
CHOICES:
Accidental/Incidental Host, Humans, Transport Host, Reservoir Hosts, Carrier, Intermediate Host, Paratenic host
Intermediate Host
the parasite does not develop further to later stages.
CHOICES:
Accidental/Incidental Host, Humans, Transport Host, Reservoir Hosts, Carrier, Intermediate Host, Paratenic host
Paratenic host
If there is more than one intermediate host, these can be classified as first and
second intermediate hosts
CHOICES:
Accidental/Incidental Host, Humans, Transport Host, Reservoir Hosts, Carrier, Intermediate Host, Paratenic host
Intermediate Host
widen the parasite distribution and bridge the ecological gap between the definitive and intermediate hosts.
CHOICES:
Accidental/Incidental Host, Humans, Transport Host, Reservoir Hosts, Carrier, Intermediate Host, Paratenic host
Paratenic host
parasite remains alive and is able to infect another susceptible host
CHOICES:
Accidental/Incidental Host, Humans, Transport Host, Reservoir Hosts, Carrier, Intermediate Host, Paratenic host
Paratenic host
Parasite-harboring host that is not exhibiting any clinical symptoms but can infect others
CHOICES:
Accidental/Incidental Host, Humans, Transport Host, Reservoir Hosts, Carrier, Intermediate Host, Paratenic host
Carrier
animals that harbor the parasite
CHOICES:
Accidental/Incidental Host, Humans, Transport Host, Reservoir Hosts, Carrier, Intermediate Host, Paratenic host
Reservoir Hosts
maybe the most important host in the spread of the disease
CHOICES:
Accidental/Incidental Host, Humans, Transport Host, Reservoir Hosts, Carrier, Intermediate Host, Paratenic host
Humans
Hosts other than the normal one that is harboring a parasite
CHOICES:
Accidental/Incidental Host, Humans, Transport Host, Reservoir Hosts, Carrier, Intermediate Host, Paratenic host
Accidental/Incidental Host
For transferring a parasite from one location to another
CHOICES:
Accidental/Incidental Host, Humans, Transport Host, Reservoir Hosts, Carrier, Intermediate Host, Paratenic host
Transport Host
allow the parasite’s life cycle to continue and become additional sources of human infection
CHOICES:
Accidental/Incidental Host, Humans, Transport Host, Reservoir Hosts, Carrier, Intermediate Host, Paratenic host
Reservoir Hosts
The following are portal of entry:
- Mouth - Ingestion , Intimate oral contact
- Skin - Active larval penetration, Introduction of the vector
- Intranasal
- Transmammary
- Transplacental
- Sexual
True or False
True
Stool, Urine, Sputum, and Blood are some of the portal o exit
True or False
True
The three common components of a parasitic life cycle are:
- Mode of Transmission
- Susceptible host
- Diagnostic Stage
True or False
False (Three Common Components • Mode of Transmission • Infective stage • Diagnostic Stage)
Babesia is transmitted through soil transmission. True or False
False (Arthropod/Vector)
Amoeba is waterborne. True or False
True
Ascaris lumbricoides, Hookworm, and Trichuris trichiura are __________
Soil-transmitted
Plasmodium spp., Leishimania spp. are ________
Arthropod/Vector
Taenia spp., Heterophyds, Fasciola are _________
Food-borne
Cyclospora, Giardia lamblia are _____
Water-borne
Trichomona vaginalis and enterobius vermicularis are ______
direct contact
For patients who have taken antibiotics or antimalarial medications, the specimen should be collected 3 weeks after the therapy. True or Falsse
False (2)
Acceptable amount of stool specimen: 2 to 5 g. True or False
True
most common procedure
Stool specimen for Ova & Parasite (O&P)
Determine the color and consistency, Examine the Gross Abnormalities, and Fresh and unpreserved stool.
Macroscopic
Direct wet preparation, Cellophane covered thick smear, and Concentration Techniques
Microscopic
Parasites are measured using an ________
Ocular Micrometer
Largest protozoan known to
humans
Balantidium coli
Largest known intestinal
nematode (roundworm)
Ascaris lumbricoides
Naegleria fowleri is can be seen in ________
Cerebrospinal Fluid (CSF) or Nasal Discharge
Plasmodium spp. is can be seen in ________
Blood
Onchocerca volvulus is can be seen in ________
Skin Snips
Paragonimus wesetermani is can be seen in ________
Sputum
Trichinella spiralis is can be seen in ________
Tissues
Trichomonas vaginalis is can be seen in ________
Genital Secretions
Schistosoma haematobium is can be seen in ________
Urine