1 (US Patent No. US D560281 (S1); US D5601344 (S1); US ...

REPRODUCIBILITY
Assay precision, intra-assay variability and inter-assay variability were assessed with a reference panel prepared from pools
of negative samples spiked with specific virus. The reproducibility panel consisted of high positive (n=2), low negative (n=1),
and low positive (n=4) and high negative specimens (n=4). The latter were prepared near the assay limit of sensitivity. Each
reference specimen was coded to prevent its identification during testing. Each was evaluated twice per day for three
consecutive days by three different laboratories. High negative samples (viral load just below LoD) produced weakly positive
results in 8 out of 72 high negative replicate tests performed with the samples prepared near the cutoff (See EP12-A2, User
protocol for evaluation of qualitative performance; approved guideline; CLSI, Vol. 28, No. 3, 2008). Low positive samples
(viral concentration near the LoD) produced one negative result in 72 replicate tests. The high positive and low negative
samples produced correct results 100% of the time.
CROSSREACTIVITY
The specificity of TRU FLU was tested utilizing the following bacterial, viral and yeast strains. Positive and negative
respiratory specimens were spiked with ≥ 4 x 10 7 /mL bacteria or yeast. Virus inoculations were performed at ≥ 6.7 X 10 4
TCID50/mL. None of the microorganisms tested yielded a positive result with the influenza-negative samples or interfered
with detection of the influenza A and/or B positive samples. Both the negative and positive respiratory samples were positive
when spiked with influenza A strain VR-100 or influenza B strain VR-295.
Adenovirus Types 1, 5 and 7A, Coxsackie Type A9, Human Coronavirus Types 229E and OC43, Cytomegalovirus,
Measles, Human metapneumovirus, Parainfluenza Types 1, 2 and 3, Rhinovirus Type 39, RSV (2 strains), Bacillus
cereus, Bacillus subtilis, Bordetella parapertussis, Bordetella pertussis, Branhamella catarrhalis, Candida albicans,
Candida glabrata, Citrobacter freundii, Enterobacter cloacae, Escherichia coli, Enterococcus faecalis, Haemophilus
influenzae, Klebsiella oxytoca, Klebsiella pneumoniae, Listeria monocytogenes, Legionella pneumophila, Neisseria
cinerea, Neisseria gonorrhoeae, Neisseria meningitidis, Nocardia asteroides, Proteus vulgaris, Pseudomonas aeruginosa,
Serratia liquifaciens, Staphylococcus aureus, Staphylococcus aureus (Cowan I), Staphylococcus epidermidis,
Streptococcus (not typed), Streptococcus Groups A, B, D, F, and G, Streptococcus pneumoniae, Yersinia enterocolitica.
A clinical sample containing Epstein Barr virus at 3.48 x 10 9 genome equivalents/mL was nonreactive with TRU FLU.
ASSAY REACTIVITY
This assay has been shown to react with the following influenza strains (in TCID50/mL): A/Victoria/3/75 (H3N2) (5.6 x 10 4 ) ,
A/FM/1/47 (H1N1) (1.6 x 10 4 ), A/Aichi/2/68 (H3N2) (8.8 x 10 3 ), A/New Jersey/8/76 (H1N1) (2.8 x 10 3 ), B/Allen/45 (4.0 x 10 2 ),
B/Hong Kong/5/72 (8.9 x 10 4 ), B/Taiwan/2/62 (3.5 x 10 1 ), B/Russia/69 (1.1 x 10 4 ). This assay was also shown to react with
the following avian/swine influenza A subtypes (by HA Titer): H1N1 (51), H2N2 (6), H3N2 (13), H4N8 (13), H5N2 (51), H5N3
(51), H5N9 (205), H6N8 (13), H7N2 (26) and H9N2 (26). The following H5N1 strains were shown to react with this assay (in
TCID50/mL): A/Vietnam/1203/04 (2.9 x 10 3 ), A/Hong Kong/486/97 (3.6 x 10 5 ), A/Hong Kong/483/97 (2.3 x 10 5 ). Refer to the
Analytical Sensitivity Section of this instruction for additional influenza strain reactivity information.
NOTE: Although this test has been shown to detect cultured avian influenza viruses, including avian influenza A
subtype H5N1 virus, the performance characteristics of this test with specimens from humans infected with H5N1
or other avian influenza viruses are unknown.
TESTS FOR INTERFERING SUBSTANCES
The following substances were found to have no effect on results when present in respiratory samples at the concentrations
indicated: Acetylsalicylic Acid (20 mg/mL), Acetaminophen (10 mg/mL), Halls® Throat Drops (20 mg/mL), Ludens® Throat
Drops (20 mg/mL), Ricola® Throat Drops (20 mg/mL), Diphenhydramine (5 mg/mL), Dextromethorphan (9% v/v),
Phenylephrine hydrochloride (9% v/v), Oxymetazoline hydrochloride (9% v/v), Chlorpheniramine maleate (5 mg/mL),
Ibuprofen (10 mg/mL), Clemastine fumarate (5 mg/mL), Naproxen sodium (10 mg/mL), Loratadine (5 mg/mL),
Pseudoephedrine (20 mg/mL), Listerine® Mouthwash (9% v/v), Scope® Mouthwash (9% v/v), Cepacol® Mouthwash (9%
v/v), Whole blood (0.5%), Guaifenesin (9% v/v), Albuterol (9% v/v).
Information regarding other tests performed with TRU FLU that are not described here can be obtained from Meridian’s
Technical Support Services at 513-271-3700 or 800-343-3858.
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