Trichomonas vaginalis – Antigen detection –  Shipped July 02, 2019

TR1907-1: Negative    TR1907-2: Positive   TR1907-3: Positive    TR1907-4: Negative


Participant’s results

Positive036 (Acceptable)36 (Acceptable)0
Negative36 (Acceptable)0036 (Acceptable)


Suitability for grading

A challenge is considered suitable for grading if agreement is reached by 80 percent of selected reference group and at least 70 percent of the participants.

Trichomonas antigen determination was correctly performed by 3/3 reference laboratories and greater than 70 percent of all laboratories and was thus, determined to be suitable for grading.

The samples are assessed for homogeneity and stability using in-house quality control methods and random selection of samples before and during production, and post sample delivery. The number of random samples selected is based on selection tables within Military standard 105E (1).

Samples TR1907-2 and -3 were positive and were homogenous and stable for 25 days from the date of production, June 27, 2019.

Samples TR1907-1 and -4 were negative and were homogenous and stable for 27 days from the date of production, June 25, 2019.

Grading of Trichomonas vaginalis antigen is based on a Positive / Negative result, no further statistical analysis is performed on the results beyond that described under “Suitability for grading.”

(1) Famum NR. Acceptance sampling. In: Modern Statistical Quality Control and Improvement. Belmont, California.: Duxbury Press; 1994:305.

Posted in critiques, Trichomonas vaginalis Results