KITS AND METHODS FOR BIOLOGICAL SAMPLE PROCESSING
Methods, apparatuses, and systems are provided for processing a biological sample. Exemplary methods comprise transferring a swab associated with an aliquot of the biological sample into a sample transport media. The methods can provide efficient transfer of a target material such as cells or nucleic acid into the sample transport media for extraction, amplification, and detection of the target material.
1 . A kit for collection of a biological sample for nucleic acid diagnostic testing, the kit comprising:
(a) a composition comprising at least one protease and an anionic detergent comprising a dodecyl sulfate, wherein the at least one protease is present at about 5.5% w/w to about 6.5% w/w, and wherein the anionic detergent is present at about 2.5% w/w to about 3.5% w/w; and
(b) a swab comprising a stem portion and a tip portion.
2 . The kit of claim 1 , wherein the anionic detergent comprises a sodium salt or a lithium salt.
3 . The kit of claim 2 , wherein the anionic detergent comprises lithium lauryl sulfate.
4 . The kit of claim 1 , wherein the at least one protease is present at about 6% w/w.
5 . The kit of claim 1 , wherein the anionic detergent is present at about 3% w/w.
6 . The kit of claim 1 , wherein the composition is contained in a tube.
7 . The kit of claim 6 , wherein the tube comprises a cap.
8 . The kit of claim 1 , wherein the tip portion of the swab is a flocked tip.
9 . The kit of claim 1 , wherein the stem portion of the swab is a flexible plastic stem.
10 . The kit of claim 1 , wherein the swab is a nasopharyngeal swab or a nasal swab.
11 . The kit of claim 1 , wherein the composition further comprises a buffer.
12 . The kit of claim 11 , wherein the buffer is a phosphate buffer or an alkali salt thereof.
13 . The kit of claim 11 , wherein the buffer comprises HEPES.
14 . The kit of claim 1 , wherein the composition further comprises a divalent cation chelator.
15 . The kit of claim 14 , wherein the divalent cation chelator comprises a magnesium chelator and/or a calcium chelator.
16 . The kit of claim 15 , wherein the divalent cation chelator comprises Trilon M, trisodium citrate, EDTA, or EGTA.
17 . The kit of claim 1 , wherein the composition further comprises a surfactant, wherein the surfactant is present at about 0.5% w/w to about 10% w/w.
18 . The kit of claim 17 , wherein the surfactant is selected from the group consisting of a partially fluorinated alkyl polyether, a c12-c14-secondary ethoxylated alcohol, an anionic low foam surfactant, or a combination thereof.
19 . The kit of claim 1 , wherein the composition further comprises 2% w/v to 3% w/v of a Good's Buffer and 0.05% w/v to 0.3% w/v of a surfactant.
20 . A method for collecting a biological sample for use in a diagnostic test, the method comprising the steps of:
a) contacting the biological sample with a swab comprising a stem portion and a tip portion, wherein at least a first portion of the biological sample is transferred to the tip portion; and
b) contacting the tip portion of the swab with an aqueous composition comprising:
(i) at least one protease, wherein the at least one protease is present at about 5.5% w/w to about 6.5% w/w, and
(ii) an anionic detergent comprising a dodecyl sulfate, wherein the anionic detergent is present at about 2.5% w/w to about 3.5% w/w,
wherein at least a second portion of the biological sample is transferred to the aqueous composition, thereby collecting the biological sample for use in a diagnostic test.
21 . The method of claim 20 , wherein the biological sample is a nasal sample or a nasopharyngeal sample.
22 . The method of claim 20 , wherein the aqueous composition is contained in a tube.
23 . The method of claim 20 , further comprising:
c) performing a nucleic acid diagnostic test on the collected biological sample from step b).
24 . The method of claim 23 , wherein the nucleic acid diagnostic test comprises nucleic acid extraction, amplification, and detection.