TR1704

Trichomonas vaginalis – Antigen detection – Shipped April 10, 2017

TR1704-1: POSITIVE     TR1704-2: NEGATIVE   TR1704-3: NEGATIVE    TR1704-4: POSITIVE 

 

Participant’s results

ResultsTR1704-1TR1704-2TR1704-3TR1704-4
Positive370038
Negative138380
No report1111
Total39393939

 

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).

The challenge sample lot was confirmed to be homogeneous and stable for at least 15 days.

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