1st LLE Flashcards
Allows the parasite’s life cycle to continue
Reservoir host
No development occurs but parasite remains alive and infective
Paratenic host
Harbors the larval stages of the parasite
Intermediate host
Parasite undergo sexual maturity
Definitive host
Cannot exist without a host
Obligate parasite
Found in animals that are transmitted to humans through conusmption
Zoonosis
Transmits parasites to humans or animals
Vector
Live outside the host within a protective eggshell or cyst
Free-living stage
Live either a parasitic or free-living existence
Facultative parasites
Only one partner benefits from the association but the host is neither helped nor harmed
Commensalism
One partner benefits at the expense of the other
Parasitism
Relationship is beneficial both of the parasite and the host
Mutualism
Parasite feeds off host’s nutrients and causes infection to host
Parasitism
Produced by endoparasites
Infection
Pediculus humans capitis
Infestation
Produced by ectoparasites
Infestation
Found on skin surface
Infestation
Which flagellates can survive for several hours in drinking water
Trichomonas tenax
How is trichomonas hominis diagnosed?
Demonstration of trophozoites in stool
Treatment used for drug resistant cases diagnosed with Giardiasis
Nitazoxanide
Gold standard for detecting Giardia lamblia
Direct Fluorescence Antibody Test
Chronic stage of Trichomonas vaginalis except?
Abundant greenish vaginal secretions
Structure responsible for the attachment of Giardia lamblia to the cells
Adhesive or sucking disc
Most common infection in males diagnosed with Trichomonas vaginalis
Prostatitis
Trichomonas vaginalis may be stained with the following except?
Hematoxylin and eosin
Patient came in the ER with complaints of diarrhea associated with rotten egg odor, nausea, and loss of appetite. What is most likely organism involved?
Giardia lamblia
Habitat of Trichomonas tenax
Mouth or oral cavity
The following are true of Giardia lamblia except?
It causes villus hypertrophy
A medical technologist was examining a sample or slide under the microscope, he noted a parasite with pyriform shape, around 20 um, has 4 anterior flagella, an undulating membrane extending through half the organism’s length with a single nucleus. What is the parasite being described
Trichomonas vaginalis
Habitat of Giardia lamblia
Duodenum, Jejunum, Ileum
Habitat of Trichomonas vaginalis in women
Vagina
In humans, Trypanosoma cruzi, amastigotes can be found in?
Tissue cells
Definitive diagnosis of Trypanosoma cruzi
Direct visualization of parasites in thick and thin blood smears
The following are true about Trypanosoma cruzi gambiense except?
Predominantly in East Africa
Arthropod of Leishmania species
Sandfly
Known to cause the dry or urban oriental sore
Leishmania tropica
This stage of Leishmaniasis involves the spread of parasite in different organs such as the bone and spleen
Visceral Leishmaniasis
The Montenegro skin test is used to identify exposure to the parasite, the result show a positive result in which of the following
Cutaneous and Mucocutaneous
What stage of Leishmaniasis may be confused with lepromatous leprosy
Diffuse Cutaneous
Romana’s sign can be seen in cases of?
Trypanosoma cruzi
