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MICR 3343 RATs 15-18

Terms in this set (41)

Which of the following is the proliferative stage of Giardia lamblia?
Trophozoite
The picture below represent _________________
Giardia lamblia
In most cases of Giardia, which of the following is the most common treatment option?
Metronidazole
A reservoir host is
Any nonhuman organism that sustains a parasite as a source of infection for humans
Which of the follow statements about Entamoeba is FALSE?
All species of Entamoeba cause disease.
Entamoeba histolytica is most often acquired by ___________________
b and d
A typical symptom of E. histolytica infection is diarrhea with mucus and blood
True
a cell with a well-defined chromosome in a membrane-bound nucleus
Eukaryote
unicellular organisms
Protozoa
the study and medical implications of parasites that infect humans"
Parasitology
multicellular organisms
Metazoan
a parasitic disease in which an animal is normally the host - but which also infects man
Zoonosis
the organism in which the parasite lives during a period of its development only"
Intermediary host
What is a Parasite?
A living organism that live inside or on top of other living organism feed from it and causes disease to it.
Which of the following is the dormant stage of Giardia lamblia?
Cyst
Put the three stages of Entamoeba histolytica disease in order from least to most severe
Amoebiasis, amoebic dysentery, extraintestinal amoebiasis
The figure below represents the infection by _______________
T. brucei congolense
T. brucei rhodesiense
The kinetoplast is present in
Trypanosomes
In Trypanosoma brucei the VSG coat changes each parasite generation facilitating the attack by the host immuno system.
False
A 24year-old male medical student from West Africa had lived in the USA for several years and had made periodic visits home to see his family. When he fell ill with symptoms of severe myalgia, abdominal discomfort, vomiting, diarrhea, fever chills and sweats, he had an itchy rash and a tender erythematous lesion on his left forearm. The doctor notices enlarged posterior cervical lymph nodes. The blood exam (smear stained with Giemsa). A lymph node aspirate was also stained by Giemsa method. Both exams showed slender protozoa forms having long, free flagella.

Which infection does this patient have?
African trypanosomiasis or chronic sleeping sickness
What is the name of the parasite causing this infection?
Trypanosoma brucei gambiense
The parasite inhabits in the _______________
Blood and Cerebrospinal fluid
A 25-year-old nurse had recently returned to US from stay in Brazil, where she had worked at a clinic treating rural patients. She developed fever, anorexia, weight loss, shortness of breath and myalgia. She visited her doctor; she had upper and lower eyelid edema in her right eye, along with conjunctivitis. Her electrocardiogram showed abnormalities and cardiomegaly.

What is the name of the illness?
Chagas disease
Which parasite is causing the infection? (mention genus and specie)
Trypanosoma cruzi
Which is the vector?
Triatomines or kissing bugs.
What are the drugs used to treat this disease?
Benznidazole and Nifurtimox.
Mary returned to Boston after a vacation in Africa. Two weeks later, she visited a doctor for treatment of ulcerated skin lesion in her face and extremities. Sample was taken from the ulcer. A Giemsa-stained smear showed monocytes containing small, oval, non-motile parasite

Which infection does Ann have?
Cutaneous Leishmaniasis
What is the name of this parasite?
Leishmania tropica or
Leishmania major
These species belong to the complex?
L. tropica complex
Which stage of this parasite is the infective form inoculated by the insect vector?
metacyclic promastigotes
Which stage of this parasite is found in the smear?
amastigotes
A 22-year-old merchant seaman developed weakness, chills and fever while on board ship which had departed two weeks previously from a West African port. In the 4 days following the initial symptoms, he became acutely ill with headache, fever (l03 F), severe diarrhea, abdominal cramps and dyspnea. Does the acute illness on board ship and recent departure from West Africa specifically indicate any of the diagnoses listed?
It could be any of the above
He was treated by the ship's doctor with a tetracycline and later penicillin but continued to have daily fevers up to l06 F. He also had persistent diarrhea and became extremely weak. Five days after onset of acute disease, the ship arrived in the USA and he was immediately hospitalized. Why was he treated with penicillin and tetracycline?
the doctor didn't have any specific means of diagnosis, but thought it might be a bacterial infection
Physical examination on admission showed an agitated, dehydrated, hypotensive white male with tachycardia, an enlarged spleen and a temperature of l00 F. A series of tests were ordered, but within 8 hours the patient complained of severe headache, became severely disoriented and developed a marked hyperthermia (l08 F); this was quickly followed by aspiration of vomitus and respiratory arrest. Attempts at resuscitation failed. In this case the immediate cause of death was respiratory arrest following aspiration but secondary to a severe disease process. Diagnostic tests were not completed but a blood smear was taken before death and subsequently examined. The stained blood smear, as shown, clearly established which diagnosis?
Falciparum malaria (malignant tertian malaria)
Who else in the hospital is now at risk for this disease
no one else is at risk
Two weeks after the seaman died, a farmer from a neighboring community in Wisconsin came down with similar symptoms. What is the likelihood that he could have gotten malaria from the seaman?
it is impossible
If you are traveling to an area where malaria is common, what can you do to prevent malaria?
Wear long sleeves and long pants
Use mosquito repellant
Take a medicine to protect against malaria
Plasmodium falciparum merozoites prefer to invade
any age rbcs
Plasmodium vivax merozoites prefer to invade
young rbcs
Malria symptoms are
Fever
headache
Coma
chills
Malaria signs are
Anemia
Splenomegaly
Black urine
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