# STD-subject

> Source: https://www.cnpairbio.com/immunoassay-diagnostics/std/std-detection/
> Author: CNPAIR
> Published: 2025-12-17
> Updated: 2026-09-08

# STD Detection Antibodies & Antigens – HIV/HBV/HCV/TP

Sexually transmitted diseases (STDs) continue to pose a significant global public health challenge.

Committed to enhancing blood safety and disease control, Cnpair has seen its five [STD detection raw materials earn a recommendation](https://jxj.hangzhou.gov.cn/art/2025/6/12/art_1229145719_1851929.html) in Hangzhou.

 ![HIV detection](https://www.cnpairbio.com/wp-content/uploads/elementor/thumbs/HIV-1-rilddxkyzltbhfknhfbvreulanqf4l6icdhzyghxxg.png)

STD Detection, Cnpair's products are designed for both [3rd and 4th generation HIV immunoassays](https://www.cnpairbio.com/immunoassay-diagnostics/std/human-immunodeficiency-virus/), including reagents for anti-HlV-1/ 2/ O and [p24 antigen](https://www.cnpairbio.com/immunoassay-diagnostics/std/human-immunodeficiency-virus/what-is-p24-antigen/) detection. Both negative (N=1019, including 27 from pregnant women) and positive (N=260) samples achieved 100% concordance with clear group separation.

 ![HIV 2](https://www.cnpairbio.com/wp-content/uploads/elementor/thumbs/HIV-2-rilddxkroh64kynz0e7m9kshdp5utdramixz7ssge0.png) ![Hepatitis B Virus](https://www.cnpairbio.com/wp-content/uploads/elementor/thumbs/HBV-1-rilddxkyzltbhfknhfbvreulanqf4l6icdhzyghxnq.png)

Cnpair provides HBsAg, [HBcAb](https://www.cnpairbio.com/immunoassay-diagnostics/std/), HBeAg and HBV Pre-S1, enabling accurate identification of HBV infection. Validated by BBI panels, our reagents demonstrate superior detection sensitivity compared to other companies.

 ![Comparative data for Cnpair's HBV detection raw materials](https://www.cnpairbio.com/wp-content/uploads/elementor/thumbs/HBV-2-rilddxkroh64kynz0e7m9kshdp5utdramixz7ssfws.png) ![Hepatitis C Virus detection](https://www.cnpairbio.com/wp-content/uploads/elementor/thumbs/HCV-1-rilddxkyzltbhfknhfbvreulanqf4l6icdhzyghxxg.png)

Cnpair provides chimeric and single-fragment [HCV antigens](https://www.cnpairbio.com/immunoassay-diagnostics/std/hepatitis-b-c/), covering multiple key epitopes, enabling clear negative/ positive differentiation and improving transition sample detection rate.

 ![Negative and Positive Sample Segregation Analysis conducted on Cnpair's HCV detection raw materials](https://www.cnpairbio.com/wp-content/uploads/elementor/thumbs/HCV-2-rilddxkroh64kynz0e7m9kshdp5utdramixz7ssg0y.png) [![syphilis -STD Detection Antibodies & Antigens](https://www.cnpairbio.com/wp-content/uploads/elementor/thumbs/TP-1-rilddxkyzltbhfknhfbvreulanqf4l6icdhzyghxxg.png)](https://www.cnpairbio.com/immunoassay-diagnostics/std/std-detection/what-is-treponema-pallidum-antibody/)

Cnpair provides multiple antigen combinations, including chimeric and single fragment antigens ([15/ 17/ 47KD](https://www.cnpairbio.com/immunoassay-diagnostics/std/std-detection/what-is-treponema-pallidum-antibody/)), with reagent storage stability at 2-8℃ for 15 months and a positive signal deviation of ≤ ±20%.

 ![Storage stability of the syphilis](https://www.cnpairbio.com/wp-content/uploads/elementor/thumbs/TP-2-rilddxkroh64kynz0e7m9kshdp5utdramixz7ssfuu.png)