Clinical Report of a Rare Mucinous Staphylococcus Aureus Infection.

BACKGROUND: Staphylococcus aureus is the most common pathogen in suppurative infection, which can cause local suppurative infection, pneumonia, etc. A case of double renal calculi complicated with chronic renal insufficiency and mucinous Staphylococcus aureus infection was analyzed and discussed. METHODS: Bacterial culture, identification, and next-generation sequencing. RESULTS: The mucous colony was identified as Staphylococcus aureus, and the condition improved after symptomatic treatment. CONCLUSIONS: Mucinous Staphylococcus is a rare clinical microorganism, which needs to be verified by experiments to avoid false negative results. Genetic sequencing is used to identify strains if necessary.

Both microbial abundance and community composition mattered for N2 production rates of the overlying water in one high-elevation river.

Overlying water is another potential hotspot of nitrogen removal through anammox and denitrification reactions in river systems. However, N2 production and the controlling factors have rarely been investigated in the overlying water of high-elevation rivers. This study analyzed the abundance and community of denitrifying and anammox bacteria as well as their effects on N2 production rates in the overlying water of the Yellow River source region (elevation range: 2687-4223 m). Higher suspended particle concentrations remarkably promoted functional gene abundances of both denitrifying and anammox bacteria (r > 0.9, p < 0.01). N2 production rates in overlying water samples ranged from 0.25 to 4.22 µmol N2 L-1 d-1. The overlying water was estimated to contribute to 36.8% (on average) of riverine N2 emission flux. Higher temperatures markedly accelerated N2 production rates (p = 0.051). Moreover, N2 production rates were positively related to both anammox and denitrifying bacterial abundances (p < 0.05), and such relationships were markedly affected by corresponding community compositions. The explanatory power of denitrifier abundance (R2 = 0.56) for N2 production rate variations was greatly elevated when it was integrated with community composition (R2 = 0.92). This study highlights the significance of overlying water nitrogen removal in the Yellow River source region; moreover, the effects of both microbial abundance and community composition on riverine N2 production rates should be considered in future research.