While it is reasonable to rely on a variety of strategies to exclude strep throat in average-risk patients, high-risk patients with a negative rapid antigen test
should have an additional rapid strep test or a throat culture to exclude strep with a certainty of greater than 95%.
A p24 antigen test
is cheap and easy to get but is not completely reliable.
pneumophila and the urinary antigen test
for Legionella spp.
In general, although studies using pretreatment stool antigen tests
have shown sensitivity and specificity comparable to those of histology or UBT, it has become evident that there can be considerable lot-to-lot variation in stool antigen tests
Comparison of polyurethane foam to nylon flocked swabs for collection of secretions from the anterior naves in performance of a rapid influenza virus antigen test
in a pediatric emergency department.
The investigators performed throat cultures and rapid antigen tests
and used clinical information to derive a clinical prediction score in each of 787 patients, aged 3-69 years, who presented with acute sore throat.
During the subsequent 2 years, patients were tested using the new high-sensitivity antigen test
(STREP A OIA; Biostar, Inc).
* Norovirus antigen test
(winter vomiting disease)--Early detection of an outbreak can help to reduce the spread of infection.
The second is called the stool antigen test
and is almost as reliable as the urea breath test.
In addition, 52 (13%) of the 388 physicians who reported using the rapid antigen test
said they did not confirm a negative result with throat culture, as the clinical guidelines recommend.
-- Not following a negative rapid antigen test
for Streptococcus pyogenes with a traditional laboratory culture may put patients at risk for serious sequelae, Dr.
Period 1 Descriptor (4/1/94 to 3/31/96) Patients with pharyngitis 15,399 and throat culture 10,098 and antigen test
8 and antigen test
+ culture 1 and no test 5292 Suppurative complications 37 Peritonsillar abscess/cellulitis 34 Retropharyngeal abscess 3 Nonsuppurative complications 0 Acute rheumatic fever 0 Poststreptococcal glomerulonephritis 0 Period 2 Descriptor (4/1/96 to 3/31/98) P Patients with pharyngitis 14,637 and throat culture 2087 <001 and antigen test
7434 <.001 and antigen test
+ culture 184 and no test 4932 Suppurative complications 36 NS Peritonsillar abscess/cellulitis 35 Retropharyngeal abscess 1 Nonsuppurative complications 1 NS Acute rheumatic fever 0 Poststreptococcal glomerulonephritis 1