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Recent EPI Publications

Active plasma sterilizer for planetary protection and contamination control for space missions

This paper introduces a novel, compact plasma sterilization system, the Active Plasma Sterilizer (APS), for planetary protection space missions. The development of the APS system is done through iterative testing and design modifications aimed at addressing decontamination modalities for time and temperature, cleaning adhesive surfaces, and cleaning protocols beyond alcohol and bleach.

Randomized Pilot Trial of the Text-Based Adherence Game for Ghanaian Youth with HIV

This study examined the feasibility, acceptability, and preliminary efficacy of a mobile intervention called the Text-Based Adherence Game (TAG). TAG aimed to improve HIV treatment adherence among young people with HIV (YPWH) in Ghana. Participants, YPWH aged 18 to 24, were recruited from an HIV clinic in Kumasi, Ghana where study procedures were conducted.

Predicting the infecting dengue serotype from antibody titre data using machine learning

The development of a safe and efficacious vaccine that provides immunity against all four dengue virus serotypes is a priority, and a significant challenge for vaccine development has been defining and measuring serotype-specific outcomes and correlates of protection. The plaque reduction neutralisation test (PRNT) is the gold standard assay for measuring serotype-specific antibodies, but this test cannot differentiate homotypic and heterotypic antibodies and characterising the infection history is challenging.

Toxin and capsule production by Bacillus cereus biovar anthracis influence pathogenicity in macrophages and animal models

Bacillus cereus biovar anthracis (Bcbva) causes anthrax-like disease in animals, particularly in the non-human primates and great apes of West and Central Africa. Genomic analyses revealed Bcbva as a member of the B. cereus species that carries two plasmids, pBCXO1 and pBCXO2, which have high sequence homology to the B. anthracis toxin and polyglutamate capsule encoding plasmids pXO1 and pXO2, respectively.

Melioidosis in goats at a single Australian farm was caused by multiple diverse lineages of Burkholderia pseudomallei present in soil

Burkholderia pseudomallei, causative agent of melioidosis, is a One Health concern as it is acquired directly from soil and water and causes disease in humans and agricultural and wild animals. We examined B. pseudomallei in soil and goats at a single farm in the Northern Territory of Australia where >30 goats acquired melioidosis over nine years.

Genomic insights into two new subspecies of Herbaspirillum huttiense strains isolated from diseased foliage in Florida Open Access

The genus Herbaspirillum was first proposed in 1986 and currently includes 13 species. Most Herbaspirillum species are plant colonizers, while others have been reported from polluted soil, wells and groundwater, as well as acting as opportunistic human pathogens. Herbaspirillum species are often documented as epiphytes, endophytes or plant pathogens in members of the Poaceae family.

A One Health Investigation into H5N1 Avian Influenza Virus Epizootics on Two Dairy Farms

In early April 2024, we studied two Texas dairy farms which had suffered incursions of H5N1 highly pathogenic avian influenza virus (HPAIV) the previous month. We employed molecular assays, cell and egg culture, Sanger and next generation sequencing to isolate and characterize viruses from multiple farm specimens (cow nasal swab, milk specimens, fecal slurry, and a dead bird).