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The Phadebas Forensic Press test is used as a presumptive test for saliva.[1]

There are other bodily substances that can test positive for alpha-amylase using the Phadebas Forensic Press test. Some examples include faeces,[1][2] semen,[2][3] urine[4][3] and tears[3]. Although there is possibility of false positives from other sources of amylase, the instructions for use published by Phadebas Forensic state that no other forensically relevant biological fluid (with the exception of faeces) will react within 10 minutes of performing the test.[1] It is also been shown that certain undiluted detergents can cause a positive reaction when tested with the Phadebas amylase test.[5] The test is not human specific; it is sensitive to saliva from other species, amylase from microbes such as Baccilus and extracts from certain plants including apple and cabbage.[6]

One alternatives to the Phadebas test is the RSID-saliva test (Independent Forensics, Hillside, IL).[4] The RSID-saliva test is an immunochromatographic assay that relies on the interaction between α-amylase and the human α-amylase antibody.[4][6] It has been observed to be more sensitive than the Phadebas test, and cross-react to fewer non-human saliva amylase sources.[4]

References

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  1. ^ a b c "Forensic Examination of Items for the Presence of Saliva" (PDF). Phadebas.com. Retrieved April 12, 2022.{{cite web}}: CS1 maint: url-status (link)
  2. ^ a b Olsén, Eva-Lena; Edenberger, Erika; Mattsson, Marianne; Ansell, Ricky (2011-12-01). "Phadebas® Forensic Press test and the presence of amylases in body fluids naturally deposited on textile". Forensic Science International: Genetics Supplement Series. 3 (1): e155–e156. doi:10.1016/j.fsigss.2011.08.078. ISSN 1875-1768.
  3. ^ a b c Wornes, Danielle J.; Speers, Samuel J.; Murakami, Julie A. (July 2018). "The evaluation and validation of Phadebas® paper as a presumptive screening tool for saliva on forensic exhibits". Forensic Science International. 288: 81–88. doi:10.1016/j.forsciint.2018.03.049. ISSN 0379-0738.
  4. ^ a b c d Casey, David G.; Price, Judy (2010-01-30). "The sensitivity and specificity of the RSID™-saliva kit for the detection of human salivary amylase in the Forensic Science Laboratory, Dublin, Ireland". Forensic Science International. 194 (1): 67–71. doi:10.1016/j.forsciint.2009.10.009. ISSN 0379-0738.
  5. ^ Feia, Andrea; Novroski, Nicole (2013-01). "The Evaluation of Possible False Positives with Detergents when Performing Amylase Serological Testing on Clothing". Journal of Forensic Sciences. 58: S183–S185. doi:10.1111/j.1556-4029.2012.02267.x. {{cite journal}}: Check date values in: |date= (help)
  6. ^ a b Pang, Benjamin C. M.; Cheung, Bobbie K. K. (2008-09). "Applicability of Two Commercially Available Kits for Forensic Identification of Saliva Stains". Journal of Forensic Sciences. 53 (5): 1117–1122. doi:10.1111/j.1556-4029.2008.00814.x. {{cite journal}}: Check date values in: |date= (help)