Marburg virus disease

MVD is a highly virulent filoviral infection marked by acute systemic collapse and progressive haemorrhagic complications, primarily mediated by MARV and RAVV of the Orthomarburgvirus marburgense species ^[1][3]. The pathogen shares considerable clinical overlap with Ebola virus disease, though distinct genomic lineages differentiate the two entities ^[1][2]. Initial human spillover events predominantly originate from prolonged environmental contact with reservoir bat populations or contaminated primate tissues in research facilities ^[1][4].

Following an incubation interval of two to twenty-one days, patients experience abrupt onset of high fever, intense headache, profound malaise, and widespread myalgia ^[3][4]. Gastrointestinal disturbances including severe watery diarrhoea, abdominal cramping, nausea, and vomiting typically emerge around the third day, frequently accompanied by a maculopapular rash between days two and seven ^[3]. As the illness advances into its second week, individuals may develop multiorgan dysfunction and overt haemorrhagic signs such as mucosal bleeding, gastrointestinal haemorrhage, and persistent oozing from venipuncture sites ^[3][4].

The condition demonstrates a documented case fatality ratio spanning twenty-four to eighty-eight percent, heavily contingent upon the timeliness and quality of clinical intervention ^[1][4]. Geographic distribution encompasses numerous sub-Saharan jurisdictions including Angola, the Democratic Republic of the Congo, Kenya, South Africa, Tanzania, and Uganda, with independent outbreaks recently confirmed in Equatorial Guinea, Rwanda, and Tanzania between 2023 and 2025 ^[1][2]. While overall incidence is infrequent, localized clusters exhibit pronounced amplification during periods of intensive household or caregiving exposure, with direct physical contact yielding substantially higher secondary attack rates than indirect environmental contact ^[5].

Primary zoonotic introduction occurs through extended exposure to underground mines or limestone caves harboring Rousettus aegyptiacus bat colonies ^[1][3]. Subsequent anthropogenic spread relies exclusively on direct contact with infectious bodily fluids, tissues, or contaminated fomites entering through compromised skin or mucous membranes ^[1][4]. Transmission dynamics intensify markedly during late-stage disease and funeral practices involving direct cadaver handling, whereas casual interactions or airborne routes have not demonstrated epidemiological significance ^[5]. Healthcare-associated transmission remains a persistent concern when standard barrier precautions are inconsistently applied ^[1][4].

Effective containment depends on integrated community-based strategies that combine rigorous case isolation, systematic contact tracing, and enhanced facility-level infection control protocols ^[1]. Public education initiatives must emphasize minimizing unshielded exposure to known bat habitats and mandate the use of personal protective equipment for essential workers operating in endemic environments ^[1]. Additionally, promoting hygienic burial practices and restricting traditional mourning rituals that involve direct physical contact with deceased individuals significantly reduces community amplification risks ^[1].

1. 1World Health Organization. Marburg virus disease [Internet]. cited 4 Sept 2026.Available from: https://www.who.int/news-room/fact-sheets/detail/marburg-virus-disease
2. 2World Health Organization. Marburg virus disease [Internet]. cited 4 Sept 2026.Available from: https://www.who.int/news-room/questions-and-answers/item/marburg-virus-disease
3. 3World Health Organization. Marburg virus disease [Internet]. cited 4 Sept 2026.Available from: https://www.who.int/health-topics/marburg-virus-disease
4. 4Asad A et al. Past and current advances in Marburg virus disease: a review. Infez Med. 2020 Sep 1. PMID: 32920568.PubMed: https://pubmed.ncbi.nlm.nih.gov/32920568/
5. 5Brainard J et al. Risk factors for transmission of Ebola or Marburg virus disease: a systematic review and meta-analysis. Int J Epidemiol. 2016 Feb. PMID: 26589246. doi: 10.1093/ije/dyv307.PubMed: https://pubmed.ncbi.nlm.nih.gov/26589246/