Pathological Studies on an Epidemic ofCaligus curtus(Copepoda) Among CaptiveMugilandSparusin Egypt with Reference to Malathion Control

Easa, M. El-S.; El-Wafa, Salah A. Abu

doi:10.1300/j028v05n02_02

Cited by 4 publications

(4 citation statements)

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“…Histopathology is an excellent tool for evaluating the effects of parasites on host fish tissues (Easa & El-Wafa 1995, Rojas et al 2018. Fish gills and skin have therefore been used as biomarkers in the evaluation of the health of fish infested by Caligus species in both laboratory and field studies.…”

Section: Histomorphological and Hematological Alterations Caused By C...mentioning

confidence: 99%

“…Infestations can result in a broad range of clinical signs (Hemmingsen et al 2020). Clinic signals such as lesions, erosions, ulcerations, and dark discoloration, especially at the tegument of Mugil cephalus Linnaeus, 1758 infested by C. curtus have been reported (Easa & El-Wafa 1995). Mugil cephalus infested by C. curtus rubbed themselves on solid substrates and presented excessive mucus.…”

Section: Histomorphological and Hematological Alterations Caused By C...mentioning

confidence: 99%

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Global distribution patterns of Caligus Müller, 1785 (Copepoda: Caligidae) associated to teleost fishes, with physiological and histopathological data and description of treatment strategies

Tavares‐Dias

Oliveira

2023

An. Acad. Bras. Ciênc.

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This review surveyed information on Caligus Müller, 1785 to identify global infestation patterns and geographic distribution in teleost fishes, as well as physiological and histopathological data and description of treatment strategies. A total 990 samples of Caligus spp. (N = 212 species) obtained of 233 scientific papers on farmed and wild teleost species from 99 families and 30 orders were used, and the highest number of occurrences was on Carangidae. Caligus spp. was predominantly found in marine environments, and only Caligus lacustris and Caligus epidemicus were found in teleost fish of freshwater environments. There was a high prevalence of Caligus spp. on hosts and infestation occurred predominantly in both the tegument and the gills. Caligus species are distributed across different countries and some particularities were identified and discussed. Caligus elongatus and Caligus bonito bonito had the broadest geographic distribution. Histomorphological and hematological disorders caused by infestation by Caligus spp. were reported and discussed, as well as chemotherapeutic products used for controlling and treating the infestations. Variation in the distribution and geographic patterns of Caligus spp. were little evident in many ecosystems and due to the limited data on the infestation of these sea lice on teleost populations in different regions.

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Section: Histomorphological and Hematological Alterations Caused By C...mentioning

confidence: 99%

Section: Histomorphological and Hematological Alterations Caused By C...mentioning

confidence: 99%

Global distribution patterns of Caligus Müller, 1785 (Copepoda: Caligidae) associated to teleost fishes, with physiological and histopathological data and description of treatment strategies

Tavares‐Dias

Oliveira

2023

An. Acad. Bras. Ciênc.

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“…However, infections with the copepod sea lice Caligus spp. have been reported to cause severe disease outbreaks and mass mortalities among mullet farms [7][8].…”

Section: Introductionmentioning

confidence: 99%

“…For Caligus infections, PCR assays targeting the 18S rRNA gene have provided a specific means to identify the implicated parasite species without reliance on microscopic examination [13]. Currently, caligid control in fish farms relies predominantly on nonspecific chemical treatments with organophosphate compounds such as malathion [7][8][9][10][11][12][13][14]. However, these treatments have negative effects on the environment and may develop resistance in sea lice [15].…”

Section: Introductionmentioning

confidence: 99%

Co-infection with Caligus clemensi and Vibrio Parahaemolyticus in Egyptian Farmed Mullets: Diagnosis, Histopathology, and Therapeutic Management

Hamada,

Attia,

Marzouk

et al. 2025

Egyptian Journal of Veterinary Sciences

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detailed an investigation into parasitic and bacterial co-infections that caused significant morbidity and mortality in farmed thin-lipped grey mullet (Liza ramada) and keeled mullet (Liza carinata) populations. Examination revealed heavy infestations of the copepod parasite Caligus clemensi in the buccal cavity, gills, and skin. Morphological identification of C. clemensi was confirmed through genetic analysis using 18S rRNA sequencing and phylogenetic analysis. The postmortem examinations revealed internal signs of disease, including liver enlargement, hemorrhages, and ascites, while histopathology demonstrated severe destruction of gill tissues associated with the parasite infection. Bacterial cultures isolated Vibrio parahaemolyticus as the cause of secondary bacterial infections, which was further characterized phenotypically and identified through recA gene sequencing. Concerningly, high rates of antibiotic resistance were detected among the V. parahaemolyticus isolates. Therapeutic prolonged baths with Virocid® disinfectant followed by probiotic treatment with Sanolife Pro-W® effectively cleared the parasite infections, resolved secondary bacterial infections, and improved fish survival rates. In summary, heavy parasite burdens of C. clemensi coupled with multiple antibiotic-resistant V. parahaemolyticus infections, were identified as the primary causes of mullet mortalities. The integrated therapy effectively managed aquaculture outbreaks, providing an alternative to excessive chemical pesticides or antibiotics by eliminating parasitic infestations and controlling secondary vibriosis.

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Seasonal dynamics of Caligus clemensi Infestation in European Seabass and flathead grey mullet Integrating morphological, molecular, immunological, and environmental perspectives

Abdelsalam,

Soliman,

Hamada

et al. 2025

Microbial Pathogenesis

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Pathological Studies on an Epidemic ofCaligus curtus(Copepoda) Among CaptiveMugilandSparusin Egypt with Reference to Malathion Control

Cited by 4 publications

References 0 publications

Global distribution patterns of Caligus Müller, 1785 (Copepoda: Caligidae) associated to teleost fishes, with physiological and histopathological data and description of treatment strategies

Global distribution patterns of Caligus Müller, 1785 (Copepoda: Caligidae) associated to teleost fishes, with physiological and histopathological data and description of treatment strategies

Co-infection with Caligus clemensi and Vibrio Parahaemolyticus in Egyptian Farmed Mullets: Diagnosis, Histopathology, and Therapeutic Management

Seasonal dynamics of Caligus clemensi Infestation in European Seabass and flathead grey mullet Integrating morphological, molecular, immunological, and environmental perspectives

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