Rhabditiform larvae measuring 275 m with a long buccal capsule and a small genital primordium was identified as hookworm. Which one of the following statements explains this discrepancy?
a. A technical error occurred in identifica-tion.
b. The larvae characteristics represent S. stercoralis; therefore the organism was incorrectly reported out.
c. The larvae characteristics represent pin-worm; therefore the organism was incor-rectly reported out.
d. No error occurred. Hookworm is the cor-rect identification for an organism with these characteristics.
D
Hookworms are typically diagnosed by the presence of eggs or rhabditiform larva found in stool specimens. The eggs and larva of the two species are indistinguishable. Eggs may appear dis-torted on permanently stained smears. The rhabditiform larvae are typically 250 to 300 with a long buccal capsule and a small genital primordium
You might also like to view...
_____, such as sea squirts, share features of the chordate body plan during early development
A. Tunicates B. Echinoderms C. Chordates D. Cephalochordates
Which of these organisms is semalparous?
A. humans B. oak trees C. bears D. dogs E. agave plants
Ion concentration differences produce an action potential creating a signal. The difference between a weak signal and an intense signal is
A. weak stimuli only open sodium gates, strong signal also open potassium gates. B. the frequency at which an axon fires. C. the action potential is graduated and a weak signal causes a small change in polarity. D. a strong signal does not allow repolarization but sends a constant flow of ions. E. All of the choices are correct.
Which of the following correctly traces the path of urine?
A) Renal pelvis ? uterus ? bladder ? urethra B) Renal pelvis ? ureter ? bladder ? urethra C) Renal pelvis ? bladder ? ureter ? urethra D) Ureter ? urethra ? bladder ? renal pelvis E) Renal pelvis ? urethra ? bladder ? ureter