Publications by authors named "Irving Hoffman"

Introduction: Couple-based behavioral interventions (CBIs) have been associated with improved HIV virological outcomes for pregnant women and their male partners living with HIV in observational settings, but have never been tested in a randomized controlled trial (RCT).

Setting: Bwaila District Hospital Antenatal clinic (Lilongwe, Malawi).

Methods: An RCT was conducted among 500 pregnant women living with HIV (index clients) randomized 1:1 to the standard of care (SOC) or CBI and followed for one year.

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Background: Incident HIV during the perinatal period significantly impedes elimination of Mother-to-Child HIV Transmission (eMTCT) efforts. Pre-Exposure Prophylaxis (PrEP) effectively reduces HIV acquisition, and new agents like injectable Cabotegravir (CAB-LA) offer potential advantages for pregnant and breastfeeding women. The Pregnancy, Infant, and Maternal health Outcomes (PrIMO) study will compare rates of composite adverse pregnancy outcomes, and infant adverse events, growth and neurodevelopment between mother-infant dyads receiving CAB-LA and those receiving oral PrEP in Malawi.

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  • * Key factors influencing HIV testing included better HIV knowledge, a history of STI testing, having engaged in anal sex with men, and lower risk perception of HIV.
  • * The research highlights a significant gap in both HIV testing and PrEP usage among AYMSM, suggesting a need for targeted interventions and further studies to understand the reasons behind these gaps.
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Background: Detection of acute (preseroconversion) HIV infection (AHI), the phase of highest transmission risk, requires resource-intensive RNA- or antigen-based detection methods that can be infeasible for routine use. Risk score algorithms can improve the efficiency of AHI detection by identifying persons at highest risk of AHI for prioritized RNA/antigen testing, but prior algorithms have not considered geospatial information, potential differences by sex, or current antibody testing paradigms.

Methods: We used elastic net models to develop sex-stratified risk score algorithms in a case-control study of persons (136 with AHI, 250 without HIV) attending a sexually transmitted infections (STI) clinic in Lilongwe, Malawi, from 2015 to 2019.

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  • The study focuses on understanding the molecular epidemiology of Treponema pallidum subspecies pallidum (TPA) to aid in the development of a global syphilis vaccine by analyzing clinical data and specimens from early syphilis patients across multiple countries.* -
  • Enrolling 233 patients with primary and secondary syphilis from China, Colombia, Malawi, and the USA, researchers utilized whole-genome sequencing (WGS) to study TPA strains, revealing important demographic information and a significant presence of HIV co-infections among participants.* -
  • The findings highlighted a dominance of SS14-lineage strains with geographical distribution patterns, confirming genetic differences in the Nichols-lineage strains, which could inform future vaccine strategies and
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Background: In Vietnam and other global settings, men who have sex with men (MSM) have become the population at greatest risk of HIV infection. Although HIV pre-exposure prophylaxis (PrEP) has been implemented as a prevention strategy, PrEP outcomes may be affected by low persistence and adherence among MSM with unhealthy alcohol use. MSM have a high prevalence of unhealthy alcohol use in Vietnam, which may affect PrEP outcomes.

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  • The study aimed to improve lumbar puncture (LP) completion rates for diagnosing meningitis in children under five in Malawi, where such rates have been historically low.
  • The intervention included refresher training for staff, automated reminders for LP procedures, and adding clinical officers specifically to support LP performance, leading to significant increases in LP rates.
  • Results showed that LP rates rose dramatically from 10.4% to 60.4% in the before/after analysis, highlighting the effectiveness of the intervention and suggesting it could be useful for future meningitis surveillance planning.
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Objective: To assess the association between breastfeeding competency, as determined by Latch, Audible swallowing, Type of nipple, Comfort, and Hold (LATCH) and Preterm Infant Breastfeeding Behavior Scale (PIBBS) scores, and exclusive breastfeeding and growth among infants with low birth weight (LBW) in India, Malawi, and Tanzania.

Study Design: We conducted LATCH and PIBBS assessments among mother-infant dyads enrolled in the Low Birthweight Infant Feeding Exploration (LIFE) observational study of infants with moderately LBW (1500g-2499 g) in India, Malawi, and Tanzania. We analyzed feeding and growth patterns among this cohort.

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Background: Low birthweight (LBW) infants are at increased risk of morbidity and mortality. Exclusive breastfeeding up to six months is recommended to help them thrive through infection prevention, growth improvements, and enhancements in neurodevelopment. However, limited data exist on the feeding experiences of LBW infants, their caregivers and key community influencers.

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Invasive non-typhoidal Salmonella (iNTS) disease manifesting as bloodstream infection with high mortality is responsible for a huge public health burden in sub-Saharan Africa. Salmonella enterica serovar Typhimurium (S. Typhimurium) is the main cause of iNTS disease in Africa.

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Background: Genital ulcer diseases (GUDs) are a common syndrome associated with sexually transmitted infections. Genital ulcer diseases increase the risk of HIV transmission, necessitating appropriate diagnosis and treatment. We provide an updated GUD etiology assessment in Malawi to guide diagnostic development and treatment algorithms.

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Background: The continuing increase in syphilis rates worldwide necessitates development of a vaccine with global efficacy. We conducted a multi-center, observational study to explore subsp. ( ) molecular epidemiology essential for vaccine research by analyzing clinical data and specimens from early syphilis patients using whole-genome sequencing (WGS) and publicly available WGS data.

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Objectives: To examine the time required to suppress HIV in the genital tract with antiretroviral therapy (ART) in men with urethritis.

Design: An observational cohort study.

Methods: Men with HIV and urethritis not on ART were enrolled at an STI clinic in Malawi and offered to initiate ART.

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Objectives: Malaria is still one of the main reasons for hospitalization in children living in sub-Saharan Africa. Rapid risk stratification at admission is essential for optimal medical care and improved prognosis. Whereas coma, deep breathing, and, to a lesser degree, severe anemia are established predictors of malaria-related death, the value of assessing prostration for risk stratification is less certain.

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Background: The coronavirus disease 2019 (COVID-19) and the measures taken to minimise its spread have significantly impacted mother- and infant-related healthcare. We describe the changes in newborn feeding, lactation support, and growth outcomes before compared to during the COVID-19 pandemic among moderately low birthweight infants (LBW) (1.5 to <2.

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  • Global antimicrobial resistance (AMR) surveillance in Neisseria gonorrhoeae is crucial, with only 10.6% of WHO African Region countries reporting in 2017-18; this study focuses on genomic diversity and AMR determinants in Uganda, Malawi, and South Africa from 2015-2020.
  • Gonococcal isolates from these countries were sequenced, revealing high resistance to ciprofloxacin (57.1%-100%), while most strains were susceptible to ceftriaxone, cefixime, and spectinomycin.
  • The findings indicate a need for stronger AMR surveillance in gonorrhea due to high ciprofloxacin resistance and emerging azithromycin resistance, supporting WHO’s Global
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Background: Understanding heterogeneity across patients in effectiveness of network-based HIV testing interventions may optimize testing and contact tracing strategies, expediting linkage to therapy or prevention for contacts of persons with HIV (PWH).

Setting: We analyzed data from a randomized controlled trial of a combination intervention comprising acute HIV testing, contract partner notification (cPN), and social contact referral conducted among PWH at 2 STI clinics in Lilongwe, Malawi, between 2015 and 2019.

Methods: We used binomial regression to estimate the effect of the combination intervention vs.

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  • Infants require care in clean environments to minimize exposure to germs, as inadequate sanitation and hygiene contribute to infections, especially in low-income areas.
  • A study evaluated water, sanitation, and hygiene practices in 12 healthcare facilities across India, Malawi, and Tanzania, focusing on infant feeding preparation to identify risks of contamination.
  • Results showed that while facilities had improved water and sanitation, many lacked written procedures for safe feeding practices, with 17% of observed behaviors executed unsafely, highlighting the need for better guidelines and research on microbial risks.
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Understanding depression, alcohol use, and sexual behaviors according to HIV infection stage and diagnosis timing is important for HIV prevention efforts. We enrolled persons with recent infection and diagnosis (i.e.

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Introduction: The HIV Prevention Trials Network (HPTN) 074 study demonstrated a positive effect of an integrated systems navigation and psychosocial counseling intervention on HIV treatment initiation, viral suppression, medication assisted treatment (MAT) enrollment, and risk of death among people who inject drugs (PWID). In this sub-study, we analyzed the incidence, causes, and predictors of death among HIV-infected and uninfected participants.

Methods: The HPTN 074 randomized clinical trial was conducted in Indonesia, Ukraine, and Vietnam.

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Globally, increasing rates of facility-based childbirth enable early intervention for small vulnerable newborns. We describe health system-level inputs, current feeding, and discharge practices for moderately low birthweight (MLBW) infants (1500-<2500g) in resource-constrained settings. The Low Birthweight Infant Feeding Exploration study is a mixed methods observational study in 12 secondary- and tertiary-level facilities in India, Malawi, and Tanzania.

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Objectives: To describe the feeding profile of low birthweight (LBW) infants in the first half of infancy; and to examine growth patterns and early risk factors of poor 6-month growth outcomes.

Design: Prospective observational cohort study.

Setting And Participants: Stable, moderately LBW (1.

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Background And Objective: Drug use type and frequency may affect Anti-Retroviral Therapy (ART) uptake for HIV-infected people who inject drugs (PWID). This paper assesses the association between self-reported baseline drug use and ART among HIV-infected PWID in Indonesia, Ukraine and Vietnam.

Methods: Data on self-reported baseline drug use and ART among HIV-infected PWID at the 26- and 52-week follow-ups were extracted from the HIV Prevention Trials Network (HPTN) 074, a randomized, controlled vanguard study to facilitate HIV treatment for PWID in Indonesia, Ukraine, and Vietnam.

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Background: Pre-exposure prophylaxis (PrEP) reduces HIV acquisition risk by >90% and is a critical lever to reduce HIV incidence. Identifying individuals most likely to benefit from PrEP and retaining them on PrEP throughout HIV risk is critical to realize PrEP's prevention potential. Individuals with sexually transmitted infections (STIs) are an obvious priority PrEP population, but there are no data from sub-Saharan Africa (SSA) confirming the effectiveness of integrating PrEP into STI clinics.

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The RTS,S/AS01 malaria vaccine was recently approved by the World Health Organization, but real-world effectiveness is still being evaluated. We measured hemoglobin concentration and parasite density in vaccinated and unvaccinated children who had been diagnosed with malaria by rapid diagnostic test (mRDT) in the outpatient department of a rural hospital in Malawi. Considering all mRDT positive participants, the mean hemoglobin concentration among unvaccinated participants was 9.

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