Mice fatal pneumonia model induced by less-virulent Streptococcus pneumoniae via intratracheal aerosolization

作者：J Wang, Lingfei Hu, Zhijun Zhang, Chengyu Sui, Xiaoyu Zhu, Chengxi Wu, Lili Zhang, Meng Lv, Wenhui Yang, Dongsheng Zhou, Zhengling Shang · 发表于：Future Microbiology · 年份：2024 · DOI：10.1080/17460913.2024.2355738 · 被引用次数：5 · 研究领域：Biomarkers in Disease Mechanisms、Phonocardiography and Auscultation Techniques、Streptococcal Infections and Treatments

Aim: Animal models of fatal pneumonia caused by Streptococcus pneumoniae (Spn) have not been reliably generated using many strains of less virulent serotypes. Materials & methods: Pulmonary infection of a less virulent Spn serotype1 strain in the immunocompetent mice was established via the intratracheal aerosolization (ITA) route. The survival, local and systemic bacterial spread, pathological changes and inflammatory responses of this model were compared with those of mice challenged via the intratracheal instillation, intranasal instillation and intraperitoneal injection routes. Results: ITA and intratracheal instillation both induced fatal pneumonia; however, ITA resulted in better lung bacterial deposition and distribution, pathological homogeneity and delivery efficiency. Conclusion: ITA is an optimal route for developing animal models of severe pulmonary infections.