# Seroprevalence and Risk Factors of Chlamydia Infection in Pigs in Hunan Province, Southern China, 2017–2018

## TL;DR

This study found a high rate of Chlamydia infection in pigs in Hunan, China, and identified risk factors like altitude and rearing systems.

## Contribution

The study provides the first comprehensive seroprevalence data and risk factors for Chlamydia in pigs in Hunan province.

## Key findings

- The overall seroprevalence of Chlamydia in pigs was 26.90%.
- Altitude, sampling regions, and rearing systems were identified as risk factors for infection.
- The findings highlight a potential risk to human health from Chlamydia in pigs.

## Abstract

Chlamydia is a Gram-negative obligate intracellular bacterium that is pathogenic for humans and a large variety of veterinary animal species. However, there is no continuous monitoring of chlamydia infection data in pigs in Hunan province, southern China. Therefore, in order to evaluate the seroprevalence and identify risk factors associated with Chlamydia infection in pigs within this region, a comprehensive study was conducted.

A total of 3848 serum samples were collected from pigs (from farmers and companies) between May 2017 and August 2018. The presence of specific antibodies against Chlamydia was determined through the employment of the indirect hemagglutination assay (IHA).

The overall seroprevalence of Chlamydia was determined to be 26.90% (1038/3848, 95% confidence interval: 25.60–28.40). By employing statistical analysis using SPSS software (p < 0.05), factors such as altitude, sampling regions, and rearing systems of pigs were identified as potential risk factors for Chlamydia infection.

These findings elucidate a substantial prevalence of Chlamydia in pigs within the mountainous region of Hunan province, southern China, thereby highlighting a potential risk to human health. These results underscore the need for proactive measures and targeted interventions to mitigate the transmission of Chlamydia in porcine populations, safeguarding both animal welfare and public health.