Question 1

Match the vector with the organism it infects.Answers may be used more than once.
-T.brucei gambiense

Accepted Answer

A) Anopheles mosquito 
B) Tsetse fly 
C) Sandfly 
D) Reduviid bug 
A) Anopheles mosquito 
B) Tsetse fly 
C) Sandfly 
D) Reduviid bug B

Question 2

Match the vector with the organism it infects.Answers may be used more than once.
-T.brucei rhodesiense

Accepted Answer

A) Anopheles mosquito 
B) Tsetse fly 
C) Sandfly 
D) Reduviid bug 
A) Anopheles mosquito 
B) Tsetse fly 
C) Sandfly 
D) Reduviid bug B

Question 3

P.vivax is suspected in a patient who has been traveling for months in the tropics.Blood was collected in a lavender top tube;however,the slide was not prepared for examination until the next day because the specimen came in on the night shift.Once the slide was prepared and examined,Schüffner dots were not visible.Which one of the following statements explains this discrepancy?

Accepted Answer

A) Schüffner dots are not characteristic of P.vivax infections. 
B) The blood film was most likely incorrectly prepared. 
C) The blood should have been collected in a red top tube. 
D) The blood remained in the tube too long,yielding false-negative results. 
A) Schüffner dots are not characteristic of P.vivax infections. 
B) The blood film was most likely incorrectly prepared. 
C) The blood should have been collected in a red top tube. 
D) The blood remained in the tube too long,yielding false-negative results. D

Question 4

Delicate ring forms and crescent-shaped gametocytes are the only forms normally observed in the peripheral blood of which Plasmodium spp.?

Accepted Answer

A) P.vivax 
B) P.malariae 
C) P.falciparum 
D) P.ovale 
A) P.vivax 
B) P.malariae 
C) P.falciparum 
D) P.ovale

Question 5

Match the size and shape of the parasitized RBCs as they appear in Giemsa-stained thin blood smears.Answers may be used more than once.
-P.falciparum

Accepted Answer

A) Normal shape and size 
B) Normal shape;size may be normal or slightly smaller 
C) 1.5 to 2.0 times larger than normal;oval to normal 
D) 60% of cells are larger than normal and oval 
A) Normal shape and size 
B) Normal shape;size may be normal or slightly smaller 
C) 1.5 to 2.0 times larger than normal;oval to normal 
D) 60% of cells are larger than normal and oval

Question 6

Stage I of trypanosomiasis characteristically involves systemic trypanosomiasis infection without central nervous system (CNS)involvement.Lymphadenopathy is also a feature of this disease.The trypomastigotes of which protozoa are involved?

Accepted Answer

A) T.cruzi 
B) T.rangeli 
C) T.brucei rhodesiense 
D) T.brucei gambiense 
A) T.cruzi 
B) T.rangeli 
C) T.brucei rhodesiense 
D) T.brucei gambiense

Question 7

Resistance to chloroquine and mefloquine has been identified in which Plasmodium spp.?

Accepted Answer

A) P.ovale 
B) P.vivax 
C) P.falciparum 
D) P.malariae 
A) P.ovale 
B) P.vivax 
C) P.falciparum 
D) P.malariae

Question 8

Ring forms and a "Maltese cross" were observed in a blood smear.The vector that transmits this disease is a(n):

Accepted Answer

A) tick. 
B) tsetse fly. 
C) anopheles mosquito. 
D) sandfly. 
A) tick. 
B) tsetse fly. 
C) anopheles mosquito. 
D) sandfly.

Question 9

Humans contract Chagas disease when the reduviid bug defecates while taking a blood meal and the parasites in the feces are rubbed or scratched into the bite wound or onto mucosal surfaces.Which stage in the blood infects the host cells?

Accepted Answer

A) Amastigote 
B) Epimastigote 
C) Trypomastigote 
D) Promastigote 
A) Amastigote 
B) Epimastigote 
C) Trypomastigote 
D) Promastigote

Question 10

Match the size and shape of the parasitized RBCs as they appear in Giemsa-stained thin blood smears.Answers may be used more than once.
-P.malariae

Accepted Answer

A) Normal shape and size 
B) Normal shape;size may be normal or slightly smaller 
C) 1.5 to 2.0 times larger than normal;oval to normal 
D) 60% of cells are larger than normal and oval 
A) Normal shape and size 
B) Normal shape;size may be normal or slightly smaller 
C) 1.5 to 2.0 times larger than normal;oval to normal 
D) 60% of cells are larger than normal and oval

Question 11

In T.brucei rhodesiense trypanosomiasis infections,CNS invasion occurs early.The disease progresses rapidly,and death may occur before extensive CNS involvement.Inflammation of which organ is more common and severe with this disease form?

Accepted Answer

A) Kidney 
B) Lungs 
C) Liver 
D) Heart 
A) Kidney 
B) Lungs 
C) Liver 
D) Heart

Question 12

Chagas disease is caused by:

Accepted Answer

A) Trypanosoma rangeli. 
B) Trypanosoma cruzi. 
C) Trypanosoma brucei rhodesiense. 
D) Trypanosoma brucei gambiense. 
A) Trypanosoma rangeli. 
B) Trypanosoma cruzi. 
C) Trypanosoma brucei rhodesiense. 
D) Trypanosoma brucei gambiense.

Question 13

A thick ring,large nucleus,and bands across the cell and 6 to 12 merozoites in a mature schizont are all characteristics of which Plasmodium spp.?

Accepted Answer

A) P.vivax 
B) P.ovale 
C) P.falciparum 
D) P.malariae 
A) P.vivax 
B) P.ovale 
C) P.falciparum 
D) P.malariae

Question 14

Cerebral malaria is considered to be the most serious complication and major cause of death with which species of Plasmodium spp.?

Accepted Answer

A) P.vivax 
B) P.falciparum 
C) P.ovale 
D) P.malariae 
A) P.vivax 
B) P.falciparum 
C) P.ovale 
D) P.malariae

Question 15

The vector Glossina palpalis group transmits the T.brucei gambiense organism.The diagnostic stage is the:

Accepted Answer

A) amastigote. 
B) epimastigote. 
C) trypomastigote. 
D) promastigote. 
A) amastigote. 
B) epimastigote. 
C) trypomastigote. 
D) promastigote.

Question 16

Match the vector with the organism it infects.Answers may be used more than once.
-T.rypanosoma cruzi

Accepted Answer

A) Anopheles mosquito 
B) Tsetse fly 
C) Sandfly 
D) Reduviid bug 
A) Anopheles mosquito 
B) Tsetse fly 
C) Sandfly 
D) Reduviid bug

Question 17

Match the size and shape of the parasitized RBCs as they appear in Giemsa-stained thin blood smears.Answers may be used more than once.
-P.knowlesi

Accepted Answer

A) Normal shape and size 
B) Normal shape;size may be normal or slightly smaller 
C) 1.5 to 2.0 times larger than normal;oval to normal 
D) 60% of cells are larger than normal and oval 
A) Normal shape and size 
B) Normal shape;size may be normal or slightly smaller 
C) 1.5 to 2.0 times larger than normal;oval to normal 
D) 60% of cells are larger than normal and oval

Question 18

The most frequent clinical signs of chronic Chagas disease involve the enlargement of which organ?

Accepted Answer

A) Heart 
B) Liver 
C) Spleen 
D) Lung 
A) Heart 
B) Liver 
C) Spleen 
D) Lung

Question 19

Match the vector with the organism it infects.Answers may be used more than once.
-T.rangeli

Accepted Answer

A) Anopheles mosquito 
B) Tsetse fly 
C) Sandfly 
D) Reduviid bug 
A) Anopheles mosquito 
B) Tsetse fly 
C) Sandfly 
D) Reduviid bug

Question 20

In cases of malaria,the primary exoerythrocytic cycle occurs in the:

Accepted Answer

A) blood. 
B) lung. 
C) liver. 
D) lymph nodes. 
A) blood. 
B) lung. 
C) liver. 
D) lymph nodes.

Exam 47: Blood and Tissue Protozoa

Match the vector with the organism it infects.Answers may be used more than once. -T.brucei gambiense

Match the vector with the organism it infects.Answers may be used more than once. -T.brucei rhodesiense

Delicate ring forms and crescent-shaped gametocytes are the only forms normally observed in the peripheral blood of which Plasmodium spp.?

Match the size and shape of the parasitized RBCs as they appear in Giemsa-stained thin blood smears.Answers may be used more than once. -P.falciparum

Stage I of trypanosomiasis characteristically involves systemic trypanosomiasis infection without central nervous system (CNS)involvement.Lymphadenopathy is also a feature of this disease.The trypomastigotes of which protozoa are involved?

Resistance to chloroquine and mefloquine has been identified in which Plasmodium spp.?

Ring forms and a "Maltese cross" were observed in a blood smear.The vector that transmits this disease is a(n):

Humans contract Chagas disease when the reduviid bug defecates while taking a blood meal and the parasites in the feces are rubbed or scratched into the bite wound or onto mucosal surfaces.Which stage in the blood infects the host cells?

Match the size and shape of the parasitized RBCs as they appear in Giemsa-stained thin blood smears.Answers may be used more than once. -P.malariae

In T.brucei rhodesiense trypanosomiasis infections,CNS invasion occurs early.The disease progresses rapidly,and death may occur before extensive CNS involvement.Inflammation of which organ is more common and severe with this disease form?

Chagas disease is caused by:

A thick ring,large nucleus,and bands across the cell and 6 to 12 merozoites in a mature schizont are all characteristics of which Plasmodium spp.?

Cerebral malaria is considered to be the most serious complication and major cause of death with which species of Plasmodium spp.?

The vector Glossina palpalis group transmits the T.brucei gambiense organism.The diagnostic stage is the:

Match the vector with the organism it infects.Answers may be used more than once. -T.rypanosoma cruzi

Match the size and shape of the parasitized RBCs as they appear in Giemsa-stained thin blood smears.Answers may be used more than once. -P.knowlesi

The most frequent clinical signs of chronic Chagas disease involve the enlargement of which organ?

Match the vector with the organism it infects.Answers may be used more than once. -T.rangeli

In cases of malaria,the primary exoerythrocytic cycle occurs in the:

Microbial Taxonomy

Bacterial Genetics, metabolism, and Structure

Host-Microorganism Interactions

Laboratory Safety

Specimen Management

Role of Microscopy

Traditional Cultivation and Identification

Nucleic Acid-Based Analytic Methods for Microbial Identification and Characterization

Overview of Immunochemical Methods Used for Organism Detection

Principles of Antimicrobial Action Resistance

Laboratory Methods and Strategies for Antimicrobial Susceptibility Testing

Staphylococcus, Micrococcus, and Similar Organisms

Streptococcus, Enterococcus, and Similar Organisms

Bacillus and Similar Organisms

Listeria Corynebacterium and Similar Organisms

Erysipelothrix, Lactobacillus, and Similar Organisms

Nocardia, Streptomyces, Rhodococcus, Oerskovia, and Similar Organisms

Enterobacteriaceae

Acinetobacter, Stenotrophomonas, and Other Organisms

Pseudomonas, Burkholderia, and Similar Organisms

Achromobacter, Rhizobium, Ochrobactrum, and Similar Organisms

Chryseobacterium, Sphingobacterium, and Similar Organisms

Alcaligenes, Bordetella Nonpertussis, Comamonas, and Similar Organisms

Vibrio, aeromonas, Plesiomonas Shigelloides, and Chromobacterium Violaceum

Sphingomonas Paucimobilis and Similar Organisms

Moraxella

Eikenella Corrodens and Similar Organisms

Pasteurella and Similar Organisms

Actinobacillus, Kingella, Cardiobacterium, Capnocytophaga, and Similar Organisms

Haemophilus

Bartonella and Afipia

Campylobacter, Arcobacter, and Helicobacter

Legionella

Brucella

Bordetella Pertussis and Bordetella Parapertussis

Francisella

Streptobacillus Moniliformis and Spirillum Minus

Neisseria and Moraxella Catarrhalis

Overview and General Considerations

Laboratory Considerations

Mycobacteria

Obligate Intracellular and Non-culturable Bacterial Agents

Cell Walldeficient Bacteria: Mycoplasma and Ureaplasma

The Spirochetes

Overview of the Methods and Strategies in Parasitology

Intestinal Protozoa

Protozoa From Other Body Sites

Intestinal Nematodes

Tissue Nematodes

Blood Nematodes

Intestinal Cestodes

Tissue Cestodes

Intestinal Trematodes

Liver and Lung Trematodes

Blood Trematodes

Overview of Fungal Identification Methods and Strategies

Hyaline Molds, Zygomycetes, Dermatophytes, and Opportunistic and Systemic Mycoses

Dematiaceious Molds

Opportunistic Atypical Fungus: Pjirovecii

The Yeasts