Parasitology

Is the living together of unlike organisms. It may also involve protection or other advantages to one or both organisms.

Organism lives in or on another depending for its survival and usually at the expense of the host

A parasite living inside the body of a host is known as a(n)

That they need a host at some stage of their life cycle to complete their development and to propagate their species.

May exist in a free living state or may become parasitic when the need arises

Passes through digestive tract without infecting host

Parasite attains sexual maturity.

Harbors asexual or larval stage

Is one in which the parasite does not develop further to later stages. However, the parasite remains alive and is able to infect another susceptible host.

Happens when the already infected individual is further infected with the same species leading to massive infection with the parasite.

Are responsible for transmitting the parasite from one host to another.

Transmits the parasite only after the latter has completed its development within the host.

harbors a particular pathogen without manifesting any signs and symptoms.

Acquired through ingesting raw or improperly cooked freshwater fish containing infective larvae.

Trophozoite that can cross the placental barrier during pregnancy.

Parasite acquired through sexual intercourse

Is the use of anthelminthic drugs in an individual or a public health program.

All of the following are considered vector-borne parasitic infection, except:

Which among the following amoebae is capable of destroying tissues locally by means of its proteolytic enzymes?

Humans in malarial parasite life cycle act as ____

Rounded cysts were found in a fresh stool preparation. The mononucleated cysts measured about 5 to 20 µm in diameter and contained a large glycogen vacuole. What is the most likely identification of this cyst?

Which of the following correctly describe giardiasis?

Which of the following is the specimen of choice to diagnose PAM?

This virulence factor of Entamoeba histolytica is known to cause cellular protein degradation in the basement membrane of host intestinal mucosa. It is known as?

Cyst formation of E. Histolytica occurs only within which of the following?

Upon examination of stool of a patient, a medical technologist observed the following: I. Trophozoites motility is progressive and rapid ii. With fine, evenly distributed granules in the peripheral chromatin; darkly stained iii. Contains small and compact karyosome centrally locate in the nucleus iv. 8 to 10 µm diameter trophozoites. These are attributed to which of the following protozoans?

Habitat: Trophozoites in the urogenital system Infective stage: Trophozoite Size: 5 to 18 um Flagella: 4 anterior Undulalating membrane: extends half the length of the body Axostyle: present

Infection of this free-living amoeba typically occurs in healthy individuals causing CNS, eye, and disseminated infections:

A patient is suspected of having amoebic dysentery. Upon microscopic examination of a fresh fecal specimen for ova and parasites, the following data were obtained: I. Trophozoites of about 25 µm in diameter ii. With unidirectional and progressive motility iii. Mononucleated with evenly distributed peripheral chromatin iv. Finely granular cytoplasm

No peripheral chromatin and chromatoidal bars

Only Entamoeba that has no cyst stage

Diagnostic stage

Feeding stage

Trophozoite that has dirty looking cytoplasm; Non-progressive motility; 12-55um in size

Definitive hosts: Pigs and Monkeys

Cytoadherence

Small race of E. histolytica

Same size as RBC

DOC for E. histolytica

Named the E. histolytica

Culture for Naegleria fowleri

Culture for Acanthamoeba

Undergo promitosis

Destruction of brain tissue and the associated menigeal irritation

Acts as a vehicle of P. Aeruginosa and L. pneumophilia

DOC For Naegleria

DOC For Acanthamoeba

Limax amoeba discovery

Babes Nodules

Trojan Horse like

Flattened intestinal villi

Strawberry Cervix

Rapid, jerky motility

Smells like Rotten eggs because of H2S

Falling leaf motility

Culture for T. vaginalis, except:

Which parasite is the largest protozoa parasitizing human?

Found only in arthropods

Basal body in certain flagellated protozoans that consists of a minute mass of chromatin embedded in the cytoplasm at the base of the flagellum

Actively responsible for multiplying through binary fission / Diagnostic Stage

Seen only in blood sample / Infective Stage

Actively migrating

New world cutaneous leishmaniasis

Old world cutaneous leishmaniasis

Lepromatous leishmaniasis / Diffuse cutaneous leishmaniasis

Kala-azar fever / Visceral leishmaniasis

Culture for amastigote

Discovered the Trypanosoma cruzi

Inflammation at the site of inoculation

Edema of the eyelid and conjunctiva

Enlargement of posterior cervical lymph nodes

Sleeping sickness

CNS invasion, more severe headache, increased mental dullness and apathy

West African form of the disease.

Kaya pa ba?