Publications by authors named "Lisa Niemann"

Background: Methamphetamine is associated with increased HIV risk and suboptimal adherence to pre-exposure prophylaxis (PrEP). Interventions to support PrEP adherence for people who use methamphetamine are needed.

Methods: We evaluated peer navigation to support adherence among people initiating PrEP who use methamphetamine.

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Objective: To compare the cardiovascular effects of a combination of medetomidine and vatinoxan (MVX) versus medetomidine (MED) alone administered intramuscularly (IM) and to determine whether heart rate (HR) can be used as a surrogate for cardiac output (CO) after the use of medetomidine with or without vatinoxan.

Study Design: A randomized, blinded, experimental, crossover study.

Animals: A group of eight healthy Beagle dogs aged 4.

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Background: Incomplete HIV seroconversion and seroreversion are increasingly documented by testing and pre-exposure prophylaxis programs more than previously recognized. This analysis reports on incomplete seroconversion and seroreversion by specimen and test type among Project DETECT participants.

Methods: Project DETECT included a longitudinal study of point-of-care tests.

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Case Summary: An 8-year-old female spayed British Shorthair cat that underwent surgical portosystemic shunt (PSS) attenuation developed progressive neurological signs 7 days postoperatively. Neurological signs progressed, despite medical management, and seizure activity became rapidly refractory to anticonvulsants. The diagnosis of post-attenuation neurological signs (PANS) was made based on the timing of the occurrence of clinical signs following surgery, absence of hyperammonaemia and suggestive MRI findings of the brain.

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Objective: To measure the effects on microcirculation of medetomidine alone (MED) or combined with vatinoxan (MVX).

Study Design: Randomized, crossover, blinded, experimental study.

Animals: A group of eight healthy purpose-bred Beagle dogs.

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Background: Point-of-care (POC) nucleic acid tests (NATs) have potential to diagnose acute HIV infection and monitor persons taking pre-exposure prophylaxis or antiretroviral therapy (ART). POC NATs have not yet been evaluated in the US.

Methods: From June 2018-March 2019, we conducted a cross-sectional evaluation of the Simple Amplification-Based Assay version II (SAMBA II) POC NAT.

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Background: HIV testing guidelines provided by the Centers for Disease Control and Prevention (CDC) are continually changing to reflect advancements in new testing technology. Evaluation of existing and new point-of-care (POC) HIV tests is crucial to inform testing guidelines and provide information to clinicians and other HIV test providers. Characterizing the performance of POC HIV tests using unprocessed specimens can provide estimates for the window period of detection, or the time from HIV acquisition to test positivity, which allows clinicians and other HIV providers to select the appropriate POC HIV tests for persons who may be recently infected with HIV.

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Article Synopsis
  • The study evaluated the sensitivity and specificity of four point-of-care (POC) HIV tests using whole blood and two using oral fluid among participants from health clinics in Seattle between 2015 and 2017.
  • It involved testing 1,256 visits, of which 179 were from individuals with HIV, and highlighted that sensitivity was slightly lower for oral fluid tests compared to whole blood tests among those on antiretroviral therapy (ART).
  • Overall, the POC tests showed high sensitivity and specificity, confirming their effectiveness in identifying HIV infections, but it was recommended that clients with recent risk retest to ensure accuracy.
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Background: Group sex events (GSEs) are common among cisgender men who have sex with men (MSM), pose a unique risk profile for HIV and sexually transmitted disease (STD) transmission, and may be on the rise, in part because of Web-based networking platforms. However, collecting data on GSEs can be challenging, and many gaps exist in our knowledge about GSE participation among MSM.

Objective: The objective of this study was to develop survey questions addressing aggregate and partner-specific group sex behaviors to measure prevalence of GSEs and associated risks in persons participating in Project Diagnostic Evaluation To Expand Critical Testing Technologies (DETECT), including MSM seeking HIV and STD testing at a public clinic in Seattle, Washington.

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The draft genome sequences of three Streptococcus suis isolates, IMT40343, IMT40201, and IMT40738, are presented here. These isolates were obtained from bronchoalveolar lavage fluid of healthy and diseased weaners from different German piglet-producing farms and differed in their susceptibility to penicillin.

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Pasteurella multocida is an important respiratory tract pathogen in intensive livestock farming, especially in pigs. Antimicrobial agents are frequently used to combat infections caused by this pathogen. In a study on antimicrobial resistance among respiratory tract pathogens of pigs from 30 German pig-producing farms, P.

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Regular HIV testing is required to ensure the safety of HIV pre-exposure prophylaxis (PrEP). We describe and discuss a series of false-positive HIV test results from an individual receiving PrEP. The expansion of PrEP will likely result in greater numbers of false-positive test results that may pose challenges for interpretation.

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The collaboration project VASIB aims at reducing the antibiotic consumption in pig production by integrating information from consulting expertise in clinical inspection, hygiene, epidemiology, microbiology and pharmacology. In this VASIB subproject, we investigated the antimicrobial susceptibility and relatedness of porcine respiratory tract pathogens. Bordetella bronchiseptica (n = 47), Pasteurella multocida (n = 18) and Streptococcus suis (n = 58) were obtained from weaner pigs at two farms.

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African immigrants living in the United States are disproportionately and uniquely affected by HIV. Evidence shows that stigma may contribute to this inequity. Applying a biopsychosocial model of health, our qualitative study explored HIV-related stigma and its impact on African immigrants living with HIV in a large northwestern U.

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