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Objective: The increasing incidence has led to more focus on pulmonary cryptococcosis in HIV-negative patients. We conducted a retrospective analysis of pulmonary cryptococcosis to understand the clinical characteristics, imaging features, diagnosis, treatment and prognosis of this disease in HIV-negative patients in respiratory department of a tertiary hospital in north China. Method: We identified retrospectively those diagnosed with pulmonary cryptococcosis in the first medical center of Chinese People’s Liberation Army General Hospital since 2009 to 2019. The clinical and image data were collected and analyzed. Results: The study involved 34 patients with pulmonary cryptococcosis. All patients were diagnosed by histopathology. It accounted for 0.93‰ of the total number of patients admitted to respiratory department in the same period. The mean age was 49 years; 26 patients (76.5%) were male. Patients were predominantly immunocompetent (30, 88.2%), and there was no underlying disease for most patients (26, 76.5%). The most frequent symptoms were cough and expectoration. Fourteen (41.2%) patients showed no symptom or sign. Multiple lesions (21, 61.8%) and subpleural lesions (23, 67.6%) were the most common. Nodule was the most common abnormality on chest computed tomography image. Eight (23.5%) patients received serum Cryptococcus capsular polysaccharide antigen test, and seven patients showed positive result. All patients recovered after antifungal treatment. Conclusions: Most patients of HIV-negative pulmonary cryptococcosis were mainly immunocompetent patients younger than 60 years without underlying diseases. There was lack of specificity in clinical manifestations and imaging findings. The prognosis of pulmonary cryptococcosis in HIV-negative patients was good.

Objective Nocardiosis is a rare opportunistic infection caused by the Nocardia species. Nocardia bacteremia is a life-threatening presentation of disseminated nocardiosis that presents diagnostic and therapeutic challenges. We performed this retrospective analysis in a Chinese hospital from 2010 to 2019 to describe the characteristics of this rare bloodstream infection. Methods We searched the database of the real-time nosocomial infection surveillance system and identified patients whose blood cultures showed Nocardia bacteria growth. The medical records of these patients were extracted and analyzed by two independent researchers. The data included age, gender, complicating disease, duration from blood drawing to reporting, clinical signs and symptoms, blood routine and C-reactive protein results, radiological examinations, sites of involvement, antibiotic treatments, and outcomes. Results Seven patients with Nocardia bacteremia were found. There were four male and three female patients, whose ages ranged from 41 to 75 years. Six (85.7%) patients had predisposing conditions and were administrated corticosteroids for various reasons before the identification of Nocardia infection. The most common symptom was fever (100%). Five patients presented with lung or skin involvement; meanwhile, three patients presented with brain involvement. One patient presented with pelvic and peritoneum involvement, respectively. The most common findings of chest CT imaging were consolidation, followed by nodules and cavitations. Trimethoprim/sulfamethoxazole was prescribed to all patients after the diagnosis of Nocardia bacteremia. Six patients recovered, and one patient ultimately died. Conclusions Nocardia bacteremia is a rare bloodstream infection that usually occurs in immunocompromised patients. Clinical manifestations of patients are nonspecific. It often causes multiple organ involvement, and early diagnosis and prompt aggressive interventions are important to improve the outcome of this disease.

Objective: Cryptococcosis is a severe opportunistic fungal infection. Cryptococcemia is a rare manifestation of cryptococcosis with high mortality. Objective: To characterize patients with cryptococcemia in Chinese PLA General Hospital since 2010 to 2019.Methods: We identified retrospectively those blood cultures with Cryptococcus sp. growth, and then obtained their clinical information which were analyzed by two independent reviewers.Results: A total of 8 patients withcryptococcemiawere identified, of which only 2 patients survived. There were 3 males and 5 females, whose age ranged from 23 to 72 years. They were all HIV negative. 1 (12.5%) had ovarian adenocarcinoma, 2 (25%) had systemic lupus erythematosus, 3 (37.5%) had primary nephrotic syndrome, 1 (12.5%) had viral myocarditis, and 1 (12.5%) were after lung transplantation. The most common symptoms were fever (100%) and confusion (50%). Out of the 8 episodes, 6 (60%) had meningeal infection and 2 (25%) presented as pulmonary involvement meanwhile. Six patients were dead at half a year follow up.Conclusions: Cryptococcemia is an unusual infection characterized by a high mortality. It requires early identify and prompt antifungal therapy.

Introduction: Body size has a significant impact on pharmacokinetics of antibiotics, and leaving body size out of consideration may increase the probability of therapeutic failure. The objective of this study is to evaluate the impact of high body weight on mortality in critically ill patients who received meropenem for pneumonia. Methods: The electronic medical records of a respiratory intensive care unit (RICU) were retrospectively screened for patients with the first diagnosis of pneumonia and receiving meropenem from 2014 to 2018. Clinical variables and outcome measures were collected in patients who met inclusion criteria. Patients were assigned to quartiles based on body weight (quartile (Q) 1 72.85 kg). Logistic regression analyses were used to investigate associations between the body weight and mortality. Mortality rates were compared among different body weight quartiles. Results: Of 1,621 patients admitted to the RICU, 146 patients met the inclusion criteria. There was no significant difference in mortality of patients in different body weight quartiles. In subgroup analysis of patients receiving mechanical ventilation, there was an association between body weight and RICU mortality (odds ratio, 2.97 [1.128-7.846]; P=0.027). In Q4, mortality rate of patients who received meropenem 2 g/day was significantly higher than that of patients who received 3 g/day (69.56% vs 35.71%; P=0.047). Conclusions: There was an association between body weight and mortality in patients receiving mechanical ventilation. Compared with low-dose meropenem, high-dose meropenem might decrease mortality rate of critically ill patients with highest body weight.

Summary Background The management of latent Mycobacterium tuberculosis infection is a new priority action for the WHO End Tuberculosis (TB) Strategy. However, national guidelines on latent tuberculosis infection testing and treatment have not yet been developed in China. Here, we present the results from the 2-year follow-up of a study that aimed to track the development of active disease in individuals with latent tuberculosis infection, identify priority populations for latent infection management, and explore the most suitable latent infection diagnostic approach. Methods A population-based multicentre prospective study was done in four sites in rural China, between 2013 and 2015. The baseline survey in 2013 measured the prevalence of latent tuberculosis infection using QuantiFERON-TB Gold In-Tube (QFT) and tuberculin skin test (TST) in eligible participants. During the follow-up phase between 2014–15, we assessed individuals who had tuberculosis infection at baseline (QFT-positivity or TST tuberculin reaction size [induration] of ≥10 mm) for the development of active disease through active case finding. Eligible participants included in follow-up survey had a birth date before June 1, 2008 (5 years or older in 2013), and continuous residence at the study site for 6 months or longer in the past year. Participants with current active tuberculosis at baseline survey were excluded. Findings Between Sept 1, 2013, and Aug 31, 2015, 7505 eligible participants (aged 5 years or older) were included in tuberculosis infection test positive cohorts (4455 were QFT positive, 6404 had TST induration ≥10 mm, and 3354 were positive for both tests) after baseline examination. During the 2-year follow-up period, 84 incident cases of active tuberculosis were diagnosed. Of participants who developed active tuberculosis, 75 were diagnosed with latent infection by QFT, 62 were diagnosed by TST, and 53 were diagnosed by both tests. An incidence rate of 0·87 (95% CI 0·68–1·07) per 100 person-years was observed for individuals who tested positive with QFT, 0·50 (0·38–0·63) per 100 person-years for those who tested positive with TST (p Interpretation Our results suggest that high-risk populations in communities in rural China, such as individuals at a high risk of disease reactivation from previous tuberculosis, should be targeted for latent infection screening and treatment with an interferon-γ releasing assay rather than a TST. Funding National Science and Technology Major Project of China, Program for Changjiang Scholars and Innovative Research Team in University of China, CAMS Innovation Fund for Medical Sciences, and Sanming Project of Medicine in Shenzhen.