PLoS neglected tropical diseases
September 21, 2026 · via Europe PMC
Comparative analysis of host responses to Oropouche viruses in placental cell infection models.
Latham KA, Brassington G, Pittman AM, +9 more, Kohl A.
AI summary — for doctors, generated from the abstract only
Lab experiments show that both an older and a newer (2024 Cuban) strain of Oropouche virus can infect placental cells, with only minor differences in how cells respond between strains.
What was studied
Comparative infection study of two placental cell lines (BeWo and JEG-3) with an earlier Oropouche virus isolate versus a 2024 Cuban reassortant isolate linked to a major outbreak, measuring host cell immune response differences.
Key findings
- Both viral isolates could infect placental cell lines
- Minor but noticeable differences in host responses were observed, particularly in IFNL3 expression
- Whether these differences translate to different effects on fetal development remains unknown
Clinical relevance
Relevant to understanding why recent Oropouche outbreaks have been linked to fetal deaths, microcephaly, and congenital malformations not clearly seen before.
Limitations
Findings are from cultured cell lines only, not animal models or human pregnancies, so clinical significance for fetal outcomes is unconfirmed.
Continue counseling pregnant patients in endemic areas about Oropouche exposure risk while further research clarifies the virus's effect on fetal development.
This is an AI-generated summary of the published abstract, not a clinical recommendation. It may not reflect the full text or subsequent updates — verify against the original source before acting on it.
Abstract
2022-2024 saw a major outbreak of midge-borne Oropouche virus (OROV, Peribunyaviridae) that affected Brazil and countries across the region and was associated with a novel reassortant of this pathogen. The description of fetal deaths, microcephaly and congenital malformations in newborns led to the question whether such pathologies had previously been overlooked or are associated with novel properties of reassortant OROV, raising the question of infection and transfer across the placenta. Here we compared infection of cultured placental cell lines (BeWo and JEG-3) with an earlier OROV isolate and a Cuban isolate from 2024. Our data suggest minor, but noticeable differences between these OROV and respective host cell responses, for example relating to IFNL3. It remains to be investigated whether characteristics of these different isolates translate to effects on fetal development, but these findings suggest that cellular responses can differ between ancestral and recent isolates of this virus.
DOI
10.1371/journal.pntd.0014593
PMID
42766635
PMCID
PMC13592696
Research metadata (titles, abstracts, authors, publication dates) is sourced from Europe PMC, which aggregates content from PubMed/MEDLINE, PubMed Central, and other providers under the U.S. National Library of Medicine (NLM/NCBI). NLM does not claim copyright on abstracts; the original journal publishers or authors may hold rights to the full articles. AI-generated summaries are derived only from the abstract, never the full text, and are always labeled as AI-generated.
Want more like this?
Browse more from the feed. A free account unlocks the full feed, saving and communities.
Back to the research feed