Question 1

When using the agar plate culture method for detecting Strongyloides stercoralis, the positive culture will show:

Accepted Answer

A)  Color change in the medium 
B)  Larvae growing at the edge of the inoculum 
C)  Larval tracks made visible by bacterial growth along the track 
D)  Increased larvae in the inoculum, as shown by washing it with 10% formalin and observing the sediment 
A)  Color change in the medium 
B)  Larvae growing at the edge of the inoculum 
C)  Larval tracks made visible by bacterial growth along the track 
D)  Increased larvae in the inoculum, as shown by washing it with 10% formalin and observing the sediment

Question 2

The modified trichrome stain can be used to reveal microsporidia in a fecal smear. Using this technique, microsporidia will appear as:

Accepted Answer

A)  Black ovals, 6 to 8 µm in diameter 
B)  Blue ovals, 4 to 6 µm in diameter 
C)  Pink ovals, 1 to 3 µm in diameter 
D)  Purple ovals, 8 to 10 µm in diameter 
A)  Black ovals, 6 to 8 µm in diameter 
B)  Blue ovals, 4 to 6 µm in diameter 
C)  Pink ovals, 1 to 3 µm in diameter 
D)  Purple ovals, 8 to 10 µm in diameter

Question 3

When using a trichrome stain to reveal parasites, an amoeba's karyosomes will stain:

Accepted Answer

A)  Dark blue 
B)  Light blue to green 
C)  Pink 
D)  Ruby red 
A)  Dark blue 
B)  Light blue to green 
C)  Pink 
D)  Ruby red

Question 4

Thick blood smears for malaria examinations are "laked" before staining by:

Accepted Answer

A)  Dipping the slide in distilled water 
B)  Dipping the slide in methanol 
C)  Leaving the slide in distilled water until all hemoglobin clears 
D)  Leaving the slide in Giemsa-buffered water for 2 hours 
A)  Dipping the slide in distilled water 
B)  Dipping the slide in methanol 
C)  Leaving the slide in distilled water until all hemoglobin clears 
D)  Leaving the slide in Giemsa-buffered water for 2 hours

Question 5

When filariasis is suspected, which of the following will improve the chances to recover parasites?

Accepted Answer

A)  Stain the smear using the modified acid-fast stain 
B)  Stain the smear using the iron hematoxylin stain 
C)  Stain the smear using the Giemsa stain 
D)  Concentrate the sample using the Knott's technique 
A)  Stain the smear using the modified acid-fast stain 
B)  Stain the smear using the iron hematoxylin stain 
C)  Stain the smear using the Giemsa stain 
D)  Concentrate the sample using the Knott's technique

Question 6

Charcot-Leyden crystals are occasionally observed in stool. These crystals are probably from breakdown products of:

Accepted Answer

A)  Eosinophils 
B)  Lymphocytes 
C)  Monocytes 
D)  Neutrophils 
A)  Eosinophils 
B)  Lymphocytes 
C)  Monocytes 
D)  Neutrophils

Question 7

If both thick and thin blood smears for malaria examination are negative, the best method to confirm the negative results is a(n):

Accepted Answer

A)  acid-fast stain 
B)  buffy coat smear 
C)  fluorescent stain 
D)  Knott's concentration technique 
A)  acid-fast stain 
B)  buffy coat smear 
C)  fluorescent stain 
D)  Knott's concentration technique

Question 8

Which of the following parasitic forms is most negatively affected when fecal specimens are stored at room temperature for more than 2 hours?

Accepted Answer

A)  Amoeba trophozoites 
B)  Giardia lamblia cysts 
C)  Hookworm eggs 
D)  Whipworm eggs 
A)  Amoeba trophozoites 
B)  Giardia lamblia cysts 
C)  Hookworm eggs 
D)  Whipworm eggs

Question 9

Artifacts found in feces that can be confused with Strongyloides stercoralis larva are:

Accepted Answer

A)  Dried stain crystals 
B)  Partially digested meat fibers 
C)  Plant hairs 
D)  Vegetable spirals 
A)  Dried stain crystals 
B)  Partially digested meat fibers 
C)  Plant hairs 
D)  Vegetable spirals

Question 10

Six Giardia lamblia were seen in a 10-field scanning of a trichrome-stained smear. The correct report of this finding is:

Accepted Answer

A)  None seen 
B)  Few Giardia lamblia noted 
C)  Moderate Giardia lamblia noted 
D)  Many Giardia lamblia noted 
A)  None seen 
B)  Few Giardia lamblia noted 
C)  Moderate Giardia lamblia noted 
D)  Many Giardia lamblia noted

When using the agar plate culture method for detecting Strongyloides stercoralis, the positive culture will show:

The modified trichrome stain can be used to reveal microsporidia in a fecal smear. Using this technique, microsporidia will appear as:

When using a trichrome stain to reveal parasites, an amoeba's karyosomes will stain:

Thick blood smears for malaria examinations are "laked" before staining by:

When filariasis is suspected, which of the following will improve the chances to recover parasites?

Charcot-Leyden crystals are occasionally observed in stool. These crystals are probably from breakdown products of:

If both thick and thin blood smears for malaria examination are negative, the best method to confirm the negative results is a(n):

Which of the following parasitic forms is most negatively affected when fecal specimens are stored at room temperature for more than 2 hours?

Artifacts found in feces that can be confused with Strongyloides stercoralis larva are:

Six Giardia lamblia were seen in a 10-field scanning of a trichrome-stained smear. The correct report of this finding is:

Introduction and Nematoda

Cestoda

Digenea

Protozoa: Amoeba

Protozoa: The Hemoflagellates Trypanosoma SPP , Leishmania SPP, Flagellates and Ciliates

Protozoa: Sporozoa

Arthropoda

Control and Treatment of Parasitic Disease

Filters

Exam 8: Clinical Laboratory Procedures

When using the agar plate culture method for detecting Strongyloides stercoralis, the positive culture will show:

The modified trichrome stain can be used to reveal microsporidia in a fecal smear. Using this technique, microsporidia will appear as:

When using a trichrome stain to reveal parasites, an amoeba's karyosomes will stain:

Thick blood smears for malaria examinations are "laked" before staining by:

When filariasis is suspected, which of the following will improve the chances to recover parasites?

Charcot-Leyden crystals are occasionally observed in stool. These crystals are probably from breakdown products of:

If both thick and thin blood smears for malaria examination are negative, the best method to confirm the negative results is a(n):

Which of the following parasitic forms is most negatively affected when fecal specimens are stored at room temperature for more than 2 hours?

Artifacts found in feces that can be confused with Strongyloides stercoralis larva are:

Six Giardia lamblia were seen in a 10-field scanning of a trichrome-stained smear. The correct report of this finding is:

Introduction and Nematoda

Cestoda

Digenea

Protozoa: Amoeba

Protozoa: The Hemoflagellates Trypanosoma SPP , Leishmania SPP, Flagellates and Ciliates

Protozoa: Sporozoa

Arthropoda

Control and Treatment of Parasitic Disease

Filters