What is the clinical evidence from this study?

Study design: Case Report. Population: Marek's disease virus (MDV) infection with systemic atherosclerosis (n=2).

What does this research mean for the field?

Marek's disease virus infection can cause systemic atherosclerosis regardless of the presence of characteristic neoplastic lymphocyte proliferation, with infected lymphocytes likely transporting the virus to arterial lesion sites. Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This investigation aims to analyze atherosclerosis in Japanese bantams infected with Marek's disease virus.

May 24, 2026Journal of Veterinary Medical ScienceOpen Access

Comparative pathological analysis of systemic atherosclerosis in two cases of Japanese bantams infected with Marek’s disease virus

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Key result

Marek's disease virus links to systemic atherosclerosis independent of neoplastic lymphocyte proliferation.

Why the study?

Infection with Marek's disease virus primarily causes neurological disorders and lymphomas, but vascular syndrome rarely occurs.

Population

Two Japanese bantams submitted for pathological examination

Design

Case report

Authors

MOMeiya OKANOFujifilm (Japan)AKAoi KurokawaNational Agriculture and Food Research Organization HTH TsutsumiEdogawa University

Discussion

Member takes

Implication

Supports MDV-atherosclerosis link independent of lymphoma in birds; hypothesis-generating for viral vascular mechanisms in other species.

Key Points

This investigation aims to analyze atherosclerosis in Japanese bantams infected with Marek's disease virus.
Pathological examination of two cases of Japanese bantams infected with Marek's disease virus.
Immunohistochemical staining to identify viral proteins.
Assessment of atherosclerotic lesions in muscular arteries throughout the body.
In the first bantam, multiple atherosclerotic lesions with neoplastic lymphocyte proliferation in the spleen and liver were detected.
Viral proteins, Meq and pp38, were seen in both cases confirming MDV's association with vascular syndrome.
MDV-infected lymphocytes were found infiltrating arterial lesions, suggesting their role in transporting the virus.

Study Design

Type

Case Report (n=2)

Structured PICO

Population

Two Japanese bantams (n=2) naturally infected with Marek's disease virus (MDV), unvaccinated against MD, kept at a zoo in Tokyo. Case 1: 5-year-old female. Case 2: 10-year-old male.

Outcome

Pathological and immunohistochemical findings of systemic atherosclerosis and MDV infection

Marek's disease virus infection can cause systemic atherosclerosis in naturally infected Japanese bantams, with viral proteins detected in arterial smooth muscle cells suggesting direct viral involvement in vascular lesion formation.

Limitations

Detailed mechanism of lipid accumulation remains unclear based on histological findings alone
Cholesterol levels of the two Japanese bantams are unknown, so secondary lipid accumulation due to vascular wall damage cannot be ruled out

Cite This Study

OKANO et al. (2026) conducted a case report in Marek's disease virus (MDV) infection with systemic atherosclerosis (n=2). Marek's disease virus infection in 2 Japanese bantams caused systemic atherosclerosis, confirming vascular syndrome occurs regardless of neoplastic lymphocyte proliferation.

synapsesocial.com/papers/6a12958948a0ea16656719f5 https://doi.org/10.1292/jvms.25-0596

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Comparative pathological analysis of systemic atherosclerosis in two cases of Japanese bantams infected with Marek’s disease virus

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Limitations

Cite This Study

Comparative pathological analysis of systemic atherosclerosis in two cases of Japanese bantams infected with Marek’s disease virus

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Limitations

Cite This Study

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