Background: An ongoing outbreak of mystery pneumonia in Wuhan was caused by coronavirus disease 2019 . The infectious disease has spread globally and become a major threat to public health. Purpose:We aim to investigate the ultra-high-resolution CT (UHR-CT) findings of imported COVID-19 related pneumonia from the initial diagnosis to early-phase follow-up.Methods: This retrospective study included confirmed cases with early-stage COVID-19 related pneumonia imported from the epicenter. Initial and early-phase follow-up UHR-CT scans (within 5 days) were reviewed for characterizing the radiological findings. The normalized total volumes of ground-glass opacities (GGOs) and consolidations were calculated and compared during the radiological follow-up by artificial-intelligence-based methods.Results: Eleven patients (3 males and 8 females, aged 32-74 years) with confirmed COVID-19 were evaluated. Subpleural GGOs with inter/intralobular septal thickening were typical imaging findings. Other diagnostic CT features included distinct margins (8/11, 73%), pleural retraction or thickening (7/11, 64%), intralesional vasodilatation (6/11, 55%). Normalized volumes of pulmonary GGOs (p=0.003) and consolidations (p=0.003) significantly increased during the CT follow-up. Conclusions:The abnormalities of GGOs with peripleural distribution, consolidated areas, septal thickening, pleural involvement and intralesional vasodilatation on UHR-CT indicate the diagnosis of COVID-19.COVID-19 cases could manifest significantly progressed GGOs and consolidations with increased volume during the early-phase CT follow-up.

Background To investigate the effect of Pulsatilla saponin B4, a purified extract form Pulsatilla Chinensis, on the treatment of clinical mastitis in dairy cows, 12 healthy cows were used as the control group (group A, no treatment), and 36 cows with mastitis were divided into 3 groups based on the quaque die (QD) intramuscular injection (IM) dose used in the as follows, group B (15 mL), group C (30 mL), group D (60 mL). Identified the microorganisms in milk during the experiment,samples in test groups were cultured, isolated, and verified by quantitative real-time polymerase chain reaction (qPCR). Somatic cell count (SCC) and serum inflammatory indices in cows were measured with a 1-day interval in group C and compared with group A. Results Results showed that bacterial detection rates were 100% (group B), 83.33% (group C) and 100% (group D). After the treatment bacterial detection rates dropped to 50.00% (group B), 50.00% (group C), and 41.67% (group D). The medicine was effective in all test groups and showed a dose-effect relationship. Serum haptoglobin (HP), prostaglandin E2 (PGE2), interleukin-1 alpha (IL-1α), interleukin-1 beta (IL-1β), interleukin-2 (IL-2), interleukin-8 (IL-8), interleukin-10 (IL-10) and tumour necrosis factor alpha (TNF-α), interleukin-4 (IL-4), leukotriene B4 (LTB4) also the SCC were significantly higher than healthy cows (P < 0.05) on the day (d) 1 in group C but had no significant difference with group A after treatment. Conclusion Treatment with Pulsatilla saponin B4 relieved mastitis, leading to relieve of bacterial infection, SCC and levels of serum inflammatory factors effectively in cows with mastitis after being administered for 4–6 days QD.