The eggs of which of the following intestinal parasites are not commonly found in feces and must be detected by other diagnostic techniques?
a. Giardia lamblia
b. Cryptosporidium parvum
c. Clonorchis sinensis
d. Enterobius vermicularis
D
Because the eggs of E. vermicularis are usually deposited around the anus, they are not com-monly found in feces and must be detected by other diagnostic techniques. The diagnosis of pinworm infection is usually made on the basis of the recovery of typical eggs, which are de-scribed as thick-shelled, football-shaped eggs with one slightly flattened side.
You might also like to view...
Summarize the process of DNA replication and outline the difference between how each strand replicates
What will be an ideal response?
Which of the following statements about Hfr cells and bacterial conjugation is false?
A. An Hfr cell becomes an F- cell if its integrated F plasmid is excised. B. If excision of the F plasmid from an Hfr cell includes some bacterial genes, a partial diploid can result. C. The genes that are transferred from an Hfr cell into a recipient cell during conjugation replace the equivalent genes in the recipient cell. D. An F' plasmid contains some bacterial genes. E. Cells with integrated F' plasmid have two copies of some genes.
Identify the numbered items in the accompanying figure. Include the following terms in your description
? presynaptic neuron
? postsynaptic neuron
? neurotransmitters waiting to be released
? neurotransmitters released by the nerve impulse
? synapse
? receptors with bound neurotransmitters
Which of the following statements about tissue transplants is true?
a. The source of graft rejection is T cell recognition of the MHC antigens on the transplanted cells. b. If transplants demonstrate a perfect match for all Rh antigens, then there is a 95% success rate. c. Successful transplants require a complete match of all MHC antigens. d. Xenotransplantation avoids the fundamental transplant mechanism of graft rejection. e. Skin can be successfully transplanted between siblings and other closely related family members