The Transmission and Prevention of Infectious Diseases in Aquatic Animals

Editorial

01 August 2023

Editorial: The transmission and prevention of infectious diseases in aquatic animals

Hongbo Jiang

Shihao Li

Xuan Dong

and

Chumporn Soowannayan

1,163 views

1 citations

Editors

Hongbo Jiang

Shenyang Agricultural University

Xuan Dong

Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences (CAFS)

Shihao Li

Institute of Oceanology, Chinese Academy of Sciences (CAS)

Chumporn Soowannayan

National Center for Genetic Engineering and Biotechnology (BIOTEC)

Impact

Hypothesis and Theory

12 May 2023

Potential role of climate change on the spread of salmonid skin condition: the biogeochemical hypothesis on ulcerative dermal necrosis on the Słupia River - Poland

Marcin Stokowski

, 1 more and

Ewa Kulczykowska

1,717 views

3 citations

sinensis (A, C): the internal structure of the testes of parasitized male crab by HE staining; (B, D): the internal structure of the testes of healthy male crab by HE staining).

Original Research

03 May 2023

Transcriptome analysis of germ cell changes in male Chinese mitten crabs (Eriocheir sinensis) induced by rhizocephalan parasite, Polyascus gregaria

Chengcheng Feng

, 4 more and

Qijun Chen

2,130 views

2 citations

Original Research

20 April 2023

Experimental transmission of piscine orthoreovirus-1 (PRV-1) in different life stages of Atlantic salmon (Salmo salar) and brown trout (Salmo trutta)

Dhamotharan Kannimuthu

, 16 more and

Bjørn Olav Kvamme

2,914 views

4 citations

Original Research

14 March 2023

Epidemiology of turbot bacterial diseases in China between October 2016 and December 2019

Ye Gao

, 7 more and

Jie Li

Turbot (Scophthalmus maximus) is an important commercial fish in China that can be infected by a series of bacterial pathogens, leading to great economic losses. In this study we focused on the epidemiology of turbot bacterial diseases in the major farming areas in China for three years. A total of 155 cases with 446 diseased turbots were investigated, and dominant bacterial pathogens were isolated from 137 cases (344 turbots). Thus, bacteria are the major threat to farming turbot in China. Edwardsiella piscicida was the major pathogen, which isolated as the dominant colony in 62 cases (40.00%) with 151 turbots (33.85%). Aeromonas salmonicida was isolated in 57 cases (36.77%) with 116 turbots (26.01%). Vibrio anguillarum was isolated in nine cases (5.81%), and Streptococcus parauberis in five cases (3.23%). Photobacterium damselae and Mycobacterium marinum were also isolated from one or two diseased fish. Other Vibrio spp. were isolated in 15 cases (9.68%). Two species of pathogen were isolated in 13 cases, and three species (E. piscicida, A. salmonicida, and S. parauberis) in one case. In 19 cases, no bacteria were isolated. Based on the annual disease analysis, we found that the E. piscicida infection proportion of total cases was greatly decreased, which may be caused by the attenuated vaccine inoculated in 2018. The antibiotic resistance of E. piscicida strains isolated in Weifang city was also determined. We found that the resistance to ceftriaxone, doxycycline, and SMZ/TMP were significantly increased from October 2016 to June 2018, and all the E. piscicida isolates exhibited resistance to SMZ/TMP in June 2018. These results indicated that E. piscicida is the major threat to turbot farming in China, and the attenuated E. piscicida vaccine exhibits effective protection. The usage of antibiotics may induce resistance quickly. Thus, development of vaccines is an important work for sustainable development of turbot farming in the future.

2,006 views

7 citations

Original Research

13 October 2022

Diversity and distribution of Perkinsus spp. along the coast of China: Implications for widespread transmission of Perkinsus spp. in mollusks

Lingtong Ye

, 6 more and

Wang Zhao

Perkinsus species, which are parasitic pathogens of mollusks, have been transmitted and dispersed to various molluscan species along the coastal waters of many countries. However, few studies have addressed the diversity and distribution of Perkinsus spp. along the coast of China. Here we used conventional PCR amplification and sequencing techniques, combined with a qPCR assay as a confirmatory test, to evaluate the prevalence of Perkinsus species in molluscan species among different sea regions of China. Three Perkinsus species—P. olseni, P. beihaiensis, and P. chesapeaki—were detected, with P. chesapeaki reported for the first time along the Chinese coast. Seven of eight molluscan species carried Perkinsus species, including Crassostrea gigas, C. hongkongensis, Sinonovacula constricta, Ruditapes philippinarum, Scapharca subcrenata, Meretrix lyrate, and Haliotis diversicolor. Perkinsus olseni was prominent in the Yellow and Bohai Sea and East China Sea, while P. beihaiensis was prominent in the South China Sea. Most of the molluscan species carried Perkinsus spp. with the medium or low levels of PCR-prevalence (<30%). The three Perkinsus species possess high levels of internal transcriber spacer haplotypes, some of which are shared among many countries. The much higher PCR-prevalence of Perkinsus spp. in the clam Ruditapes philippinarum and the oyster Crassostrea hongkongensis suggests that Perkinsus species may be transmitted and dispersed to other mollusks through the transportation of Perkinsus-carried R. philippinarum and C. hongkongensis. Perkinsus carrying tended to be generally linked with a broader geographic range, lower prevalence, more diversified molluscan hosts, and more diversified Perkinsus haplotypes.