New HIV diagnoses in patients with COVID-19: two case reports and a brief literature review.

BACKGROUND: COVID-19 is novel infectious disease with an evolving understanding of its epidemiology and clinical manifestations. Severe cases developed life-threatening complications, such as respiratory failure, shock, and multiple organs dysfunction. Immunocompromised patients often present atypical presentations of viral infected diseases. CASE PRESENTATION: We report newly diagnosed HIV infections in two patients with COVID-19 in China. In our two cases, both patients with elevated IL-6 received Tocilizumab treatment, but did not present obvious therapeutic effect. CONCLUSIONS: These cases highlight possible co-detection of known immunocompromised diseases such as HIV. The two cases we reported stressed the risk of misdiagnosis, especially during the pandemic of an infectious disease and the importance of extended testing even if in immune-compromised condition the immune state may be ignored.

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Fine root morphology and chemistry characteristics of dominant species Castanopsis platya-cantha in an evergreen broad-leaved forest in subtropical China and their response to nitrogen (N) addition were determined in order 1st to 5th. With the increase of root order, C. platyacantha root diameter, tissue density (RTD), and K content increased, and specific root length (SRL), speci-fic surface area (SRA) and contents of N, P and Mg decreased. Nitrogen addition significant increased N content and decreased Mg content and C/N of fine roots. Root tissue Ca content had a decrease trend under N addition treatments. There were neither significant effects on the contents of C, P, K, Na, Al, Mn, Fe of fine roots, nor on fine root diameter, SRL, SRA and RTD. Root P content had a significant liner relationship with root morphology in the all treatments. Nitrogen addition changed the linear relationships between tissue Mg content and root morphology from no significant relationship to significant relationship, and linear relationships between tissue N content and root morphology from significant relationship to no significant relationship. N addition would affect the root tissue nutrient contents and could enhance P and Mg requirement of plants.