Weekly epidemiological recordRelevé épidémiologique hebdomadaire 3 MAY 2024, 99th YEAR / 3 MAI 2024, 99e ANNÉE
No 18, 2024, 99, 203–224
The WHO position papers are concerned primarily with the use of vaccines in large-scale vaccination programmes.
The position papers are intended for use by... national public health officials and managers of immunization programmes.
This paper focuses on the second licensed dengue vaccine, TAK-003 (Qdenga, Takeda), along with WHO’s position for its use, and provides an update on the first licensed dengue vaccine, CYD-TDV.
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Nat Commun 9, 5370 (2018). https://doi.org/10.1038/s41467-018-07804-8. Mycobacterium ulcerans is the causative agent of Buruli ulcer, a neglected tropical skin disease that is most commonly found in children from West and Central Africa. Despite the severity of the infection, therapeutic options are... limited to antibiotics with severe side effects. Here, we show that M. ulcerans is susceptible to the anti-tubercular drug Q203 and related compounds targeting the respiratory cytochrome bc1:aa3. While the cytochrome bc1:aa3 is the primary terminal oxidase in Mycobacterium tuberculosis, the presence of an alternate bd-type terminal oxidase limits the bactericidal and sterilizing potency of Q203 against this bacterium. M. ulcerans strains found in Buruli ulcer patients from Africa and Australia lost all alternate terminal electron acceptors and rely exclusively on the cytochrome bc1:aa3 to respire. As a result, Q203 is bactericidal at low dose against M. ulcerans replicating in vitro and in mice, making the drug a promising candidate for Buruli ulcer treatment.
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