한국과 포르투갈 이매패에서 나타나는 Perkinsus olseni 감염의 지역적 차이: 유병률·병리학적 특성 (Regional Disparities in Perkinsus olseni Infection: Prevalence and Pathological Characteristics in Clams from Korea and Portugal)

서지정보

· 발행기관 : 한국패류학회
· 수록지 정보 : The Korean Journal of Malacology / 41권 / 2호 / 71 ~ 78페이지
· 저자명 : 김영욱, 김승현, 김민수, 송태성, W.A.A.H. Kalhari, Andreia Cruz, 박경일, 이동현, 룽진시아

초록

This research investigated Perkinsus olseni infection patterns in clams from two geographically distinct regions: Korean Manila clams (Ruditapes philippinarum) and Portuguese carpet shell clams (R. decussatus). Specimens were collected from Gochang, Korea and Olhão, Portugal for comprehensive molecular and histopathological analysis. PCR diagnostics demonstrated a striking disparity in infection prevalence, with Korean clams exhibiting a 95.0% infection rate compared to only 33.3% in Portuguese specimens. Genetic characterization through ITS sequence analysis revealed significant phylogenetic differentiation, with Korean isolates clustering within Asian lineages while Portuguese isolates aligned with Atlantic lineages. Histopathological examinations further substantiated these regional differences, as Korean samples displayed widespread infection across multiple tissue types with pronounced inflammatory responses, whereas Portuguese samples showed only localized, mild infection restricted to gill tissue in a single specimen. These marked regional variations in infection patterns likely stem from a complex interplay of environmental factors, host-specific susceptibility differences, and pathogen virulence characteristics. This study provides critical insights into the regional epidemiology of P. olseni infections and emphasizes the importance of developing region-specific approaches for understanding and managing host-pathogen dynamics in marine bivalve populations.

영어초록

This research investigated Perkinsus olseni infection patterns in clams from two geographically distinct regions: Korean Manila clams (Ruditapes philippinarum) and Portuguese carpet shell clams (R. decussatus). Specimens were collected from Gochang, Korea and Olhão, Portugal for comprehensive molecular and histopathological analysis. PCR diagnostics demonstrated a striking disparity in infection prevalence, with Korean clams exhibiting a 95.0% infection rate compared to only 33.3% in Portuguese specimens. Genetic characterization through ITS sequence analysis revealed significant phylogenetic differentiation, with Korean isolates clustering within Asian lineages while Portuguese isolates aligned with Atlantic lineages. Histopathological examinations further substantiated these regional differences, as Korean samples displayed widespread infection across multiple tissue types with pronounced inflammatory responses, whereas Portuguese samples showed only localized, mild infection restricted to gill tissue in a single specimen. These marked regional variations in infection patterns likely stem from a complex interplay of environmental factors, host-specific susceptibility differences, and pathogen virulence characteristics. This study provides critical insights into the regional epidemiology of P. olseni infections and emphasizes the importance of developing region-specific approaches for understanding and managing host-pathogen dynamics in marine bivalve populations.

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