Time From HIV Infection to Diagnosis in the U.S., 2014-2018.

INTRODUCTION: Understanding the role of sociologic, structural, and biomedical factors that influence the length of time from HIV infection to diagnosis and reducing the time from infection to diagnosis are critical for achieving the goals of the Ending the HIV Epidemic initiative. In a retrospective analysis, the length of time from HIV infection to diagnosis and its association with individual- and facility-level attributes are determined. METHODS: Data reported by December 2019 to the U.S. National HIV Surveillance System for people with HIV diagnosed during 2014-2018 were analyzed during December 2020. A CD4 depletion model was used to estimate the time from HIV infection to diagnosis. RESULTS: During 2018, the median time from HIV infection to diagnosis was shorter for those infections diagnosed using the rapid testing algorithm (30.3 months, 95% CI=25.5, 34.5) than those diagnosed using the recommended (41.0 months, 95% CI=39.5, 42.0), traditional (37.0 months, 95% CI=29.5, 43.5), or other (35.5 months, 95% CI=32.5, 38.0) diagnostic testing algorithms. From 2014 to 2018, the time from HIV infection to diagnosis remained stable overall for all testing methods except for the traditional diagnostic testing algorithm. In multivariate analyses, those more likely to have HIV diagnosed closer to the time of infection were younger, were White, had transmission risk factors of injection drug use or heterosexual contact (for female individuals) or male-to-male sexual contact and injection drug use, or had HIV diagnosed at a correctional or screening facility (p<0.01). CONCLUSIONS: Providing access to expanded testing, including rapid testing in nonclinical settings, is likely to result in a decrease in the length of time a person is unaware of their HIV infection and thus reduce onward transmission of HIV infection.

Trends in HIV-2 Diagnoses and Use of the HIV-1/HIV-2 Differentiation Test - United States, 2010-2017.

Since 2014, the recommended laboratory testing algorithm for diagnosing human immunodeficiency virus (HIV) infection has included a supplemental HIV-1/HIV-2 differentiation test to confirm infection type on the basis of the presence of type-specific antibodies (1). Correctly identifying HIV-1 and HIV-2 infections is vital because their epidemiology and clinical management differ. To describe the percentage of diagnoses for which an HIV-1/HIV-2 differentiation test result was reported and to categorize HIV type based on laboratory test results, 2010-2017 data from CDC's National HIV Surveillance System (NHSS) were analyzed. During 2010-2017, a substantial increase in the number of HIV-1/HIV-2 differentiation test results were reported to NHSS, consistent with implementation of the HIV laboratory-based testing algorithm recommended in 2014. However, >99.9% of all HIV infections identified in the United States were categorized as HIV-1, and the number of HIV-2 diagnoses (mono-infection or dual-infection) remained extremely low (<0.03% of all HIV infections). In addition, the overall number of false positive HIV-2 test results produced by the HIV-1/HIV-2 differentiation increased. The diagnostic value of a confirmatory antibody differentiation test in a setting with sensitive and specific screening tests and few HIV-2 infections might be limited. Evaluation and consideration of other HIV tests approved by the Food and Drug Administration (FDA) that might increase efficiencies in the CDC and Association of Public Health Laboratories-recommended HIV testing algorithm are warranted.

Evaluation of disparity in care for perforated appendicitis in a universal healthcare system.

PURPOSE: Racial and socioeconomic disparities have been reported in the management of appendicitis. Perforated appendicitis (PA) is used as an index for barriers to care due to delays in treatment. This study evaluates the effect of racial and socioeconomic differences on the likelihood of PA in a universally insured national healthcare system. METHODS: A retrospective review of pediatric patients enrolled in TRICARE who underwent appendectomy during a 5-year period was performed. Logistic regression was used to examine the association between ethnicity, age, gender, parent, or guardian marital status and deployment status of the active duty parent, type of facility, and type of admission with the odds of perforated appendicitis. RESULTS: A total of 3124 children met inclusion criteria. One-third of children carried the diagnosis of PA. Increased odds of PA was associated with younger age of patient among children of military personnel with enlisted ranks and senior officer ranks. CONCLUSION: In a universal healthcare system, no disparities across race with regard to presentation of appendicitis were identified. Increased odds of perforated appendicitis were observed in younger patients, but this was demonstrated in families of both high and low socioeconomic status. Universal coverage does appear to eliminate some barriers to healthcare.

Detection of staphylococcal enterotoxin B (SEB) by enzyme-linked immunosorbent assay and by a rapid hand-held assay.

Staphylococcal enterotoxins are a frequent cause of food poisoning. Immunologically-based assays for the detection of staphylococcal enterotoxins are commercially available, but require at minimum of 3 hours. We used staphylococcal enterotoxin B to compare two commercially available assays with a newly developed rapid immunochromatographic-based hand-held assay. The detection limit of the commercially available assays accounted for 500 pg and 100 pg enterotoxin B/ml, respectively, whereas 50 pg enterotoxin B /ml were detected within 15 min using the hand-held assay. Enterotoxin B-spiked custard served as a model to detect staphylococcal enterotoxin in food. Depending on the extraction method applied, the detection limit was in the range of 500 pg to 2500 pg/g custard for the commercially available assays and 62.5 pg/g for the hand-held assay. We conclude that the hand-held assay is widely applicable because it is sensitive, specific with regard to the tested enterotoxins, and the results can be read with the naked eye.