Ignite Creation Date:
2025-12-25 @ 12:34 AM
Ignite Modification Date:
2025-12-25 @ 10:43 PM
Study NCT ID:
NCT07055867
Status:
ENROLLING_BY_INVITATION
Last Update Posted:
2025-07-09
First Post:
2025-05-06
Is NOT Gene Therapy:
False
Has Adverse Events:
False
Brief Title:
Epidemiological and Clinical Characteristics of Mpox Outbreak in Equateur, the DR Congo (Part1)
Sponsor:
Osaka Metropolitan University
Organization:
Study Overview
Official Title:
Epidemiological and Clinical Characteristics of Mpox Outbreak in Equateur, the DR Congo (Part1)
Status:
ENROLLING_BY_INVITATION
Status Verified Date:
2025-07
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
The goal of this observational study is to characterize the clinical features of the 2024 mpox outbreak in Equateur Province of DRC and to identify associated risk factors. The main question it aims to answer is:
* What are the clinical features of the 2024 mpox outbreak in Equateur Province of DRC?
* What are the associated risk factors of the 2024 mpox outbreak? Participants which has mpox like symptoms will answer mpox investigations related questions and be collected skin lesions and whole blood samples.
* What are the clinical features of the 2024 mpox outbreak in Equateur Province of DRC?
* What are the associated risk factors of the 2024 mpox outbreak? Participants which has mpox like symptoms will answer mpox investigations related questions and be collected skin lesions and whole blood samples.
Detailed Description:
Mpox is caused by the monkeypox virus (MPXV), a member of the genus Orthopoxvirus (family Poxviridae). This virus is closely related to the variola virus, which causes smallpox. MPXV was first identified in 1958, and the first human case was reported in the Democratic Republic of the Congo (DRC) in 1970. It was presumed that the smallpox (vaccinia) vaccine would confer cross-protection against mpox. Following the global eradication of smallpox in 1980, mpox remained largely confined to limited regions in Central Africa-where zoonotic spillover from wild animal reservoirs constituted the primary route of transmission. Equateur Province is among the areas in the DRC with a notably high burden of reported mpox cases.
Over the past five decades, routine smallpox vaccination ceased worldwide, resulting in waning herd immunity against orthopoxviruses. During this period, mpox incidence rose markedly, with an estimated tenfold increase in global cases. Two principal genetic clades of MPXV have been identified: clade I (historically referred to as the Congo Basin clade) and clade II (the West African clade). In 2018, Nigeria experienced a resurgence of mpox, highlighting the virus's potential to emerge in previously controlled areas. Starting in 2022, clade II mpox circulated globally, especially among men who have sex with men (MSM), peaking in mid-2022 before declining to persistently lower levels by early 2023. Although clade II mpox typically exhibits a low case-fatality ratio (\<1%), clade I has historically been associated with more severe disease and higher mortality. In 2023, the number of reported mpox cases continued to climb in the DRC, prompting the World Health Organization (WHO) to declare a Public Health Emergency of International Concern (PHEIC) in August 2024.
Recent surveillance indicates that sub-clade Ia MPXV is spreading in western DRC through multiple transmission modes, including contact with infected wild animals, household exposure, or sexual contact. By contrast, sub-clade Ib mpox in the eastern part of the country appears initially to spread via intimate or sexual contact between adults, followed by household transmission. Numerous environmental and social risk factors-including the consumption of rodent species, deforestation, climate change, civil unrest, population displacement, emerging MPXV variants, and weakened immunity-may be driving mpox incidence. Clade Ia mpox is currently affecting western parts of the DRC, yet the epidemiology remains poorly understood due to the limited number of laboratory-confirmed cases.
This study aims to characterize the clinical features of the 2024 mpox outbreak in Equateur Province of DRC and to identify associated risk factors. The findings will advance understanding of mpox transmission dynamics and disease severity, ultimately informing more effective prevention and control strategies in endemic settings.
Over the past five decades, routine smallpox vaccination ceased worldwide, resulting in waning herd immunity against orthopoxviruses. During this period, mpox incidence rose markedly, with an estimated tenfold increase in global cases. Two principal genetic clades of MPXV have been identified: clade I (historically referred to as the Congo Basin clade) and clade II (the West African clade). In 2018, Nigeria experienced a resurgence of mpox, highlighting the virus's potential to emerge in previously controlled areas. Starting in 2022, clade II mpox circulated globally, especially among men who have sex with men (MSM), peaking in mid-2022 before declining to persistently lower levels by early 2023. Although clade II mpox typically exhibits a low case-fatality ratio (\<1%), clade I has historically been associated with more severe disease and higher mortality. In 2023, the number of reported mpox cases continued to climb in the DRC, prompting the World Health Organization (WHO) to declare a Public Health Emergency of International Concern (PHEIC) in August 2024.
Recent surveillance indicates that sub-clade Ia MPXV is spreading in western DRC through multiple transmission modes, including contact with infected wild animals, household exposure, or sexual contact. By contrast, sub-clade Ib mpox in the eastern part of the country appears initially to spread via intimate or sexual contact between adults, followed by household transmission. Numerous environmental and social risk factors-including the consumption of rodent species, deforestation, climate change, civil unrest, population displacement, emerging MPXV variants, and weakened immunity-may be driving mpox incidence. Clade Ia mpox is currently affecting western parts of the DRC, yet the epidemiology remains poorly understood due to the limited number of laboratory-confirmed cases.
This study aims to characterize the clinical features of the 2024 mpox outbreak in Equateur Province of DRC and to identify associated risk factors. The findings will advance understanding of mpox transmission dynamics and disease severity, ultimately informing more effective prevention and control strategies in endemic settings.
Study Oversight
Has Oversight DMC:
False
Is a FDA Regulated Drug?:
False
Is a FDA Regulated Device?:
False
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
False
Is an FDA AA801 Violation?: