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Frenemy: adaptive temperate phage_SAP_1432 supports Staphylococcus aureus survival in changing temperatures

文献类型： 外文期刊

作者： Liu, Ting-ting 1 ; Gao, Peng-cheng 1 ; Cui, Jie-wen 1 ; Wang, Wu-bin 1 ; Zheng, Fu-ying 1 ; Li, Xue-rui 1 ; Chu, Yue-feng 1 ;

作者机构： 1.Lanzhou Univ, Lanzhou Vet Res Inst, Chinese Acad Agr Sci, Coll Vet Med,State Key Lab Anim Dis Control & Prev, Lanzhou, Gansu, Peoples R China

关键词： Staphylococcus aureus; heat-resistant temperate phage; temperature; thermal performance curve; lysogeny

期刊名称：MICROBIOLOGY SPECTRUM （ 影响因子：3.8； 五年影响因子：4.1 ）

ISSN：

年卷期： 2025 年 13 卷 8 期

页码：

收录情况： SCI

摘要： It is important to understand how the presence of pathogens could benefit the survival of their hosts during climate change. In this study, we investigated the influence of the heat-resistant temperate phage phage_SAP_1432 on its bacterial host Staphylococcus aureus Q1432 at different temperatures. Thermal host performance curves at a multiplicity of infection of 0.001 showed that the phage killed the bacterium efficiently from 20 to 39 degrees C and from 47 to 50 degrees C. However, the phage resulted in a 41.2% increase in the maximal growth rate for the host bacterium from 1.53 (95% confidence interval [CI]: 1.42-1.63) in the absence of phage_SAP_1432 to 2.16 (95% CI: 2.02-2.37) in its presence, along with a shift in the optimum temperature from 41.0 degrees C to 44.1 degrees C. In the absence of phage, the maximum survival temperature of S. aureus Q1432 was 51 degrees C, but after co-culture with phage_SAP_1432, a few bacteria survived at 55 degrees C-80 degrees C. Lysogenesis occurred more easily at lower temperatures; the percentage of lysogenesis increased with phage concentration, while the maximum growth rate of the host decreased. Our findings provide new evidence that heat-resistant temperate phages can benefit the survival of their bacterial host at specific temperatures, giving a new perspective on the effects of co-evolution of heat-resistant temperate phages and bacterial hosts in an era of global climate change.IMPORTANCEUnderstanding pathogen-host interactions is crucial for predicting climate change impacts on microbial ecosystems. This study examined the heat-resistant temperate phage_SAP_1432 and its effects on Staphylococcus aureus Q1432 at various temperatures. Phage_SAP_1432 enhanced the thermal performance and survival at high temperatures of its host at a low MOI. This mutual benefit demonstrates the adaptive advantages phages provide in changing thermal environments. As global temperatures rise, such phage-host interactions may play a critical role in microbial survival and evolution. Our research highlights the potential for phages to act as allies, offering a new perspective on the co-evolution of heat-resistant temperate phages and their bacterial hosts.

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