Evidence of complement-mediated killing of Discocotyle sagittata (Platyhelminthes, Monogenea) oncomiracidia

Rubio‐Godoy, Miguel; Porter, Robert P.; Tinsley, R. C.

doi:10.1016/j.fsi.2003.11.005

Cited by 32 publications

(27 citation statements)

References 24 publications

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“…expression of complement factors or increased splenosomatic index, as have been reported in other studies [36][37][38]. Similarly, at sites with elevated toxic pressure including contamination by AhR-ligands, there was no evidence for a suppression of chub immune status, as shown for toxic exposure of fish, in particular for exposure to AhR-ligands, by other authors [39][40][41].…”

Section: Discussionsupporting

confidence: 72%

Assessing relationships between chemical exposure, parasite infection, fish health, and fish ecological status: A case study using chub (Leuciscus cephalus) in the Bílina River, Czech Republic

Wenger

Ondračková

Machala

et al. 2009

Enviro Toxic and Chemistry

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Multiple stressor scenarios, as they are relevant in many watersheds, call for approaches extending beyond conventional chemical-focused approaches. The present study, investigated the fish population, represented by chub (Leuciscus cephalus), in the Bílina River (Czech Republic), which is impacted by various pollution sources and might pose a risk on the fish population. To confirm or reject this hypothesis it was examined whether there exists an association between abundance of chub and exposure to toxic chemicals as well as natural stressors, represented by parasites, and whether health-related suborganismal traits, namely, organ indices, tissue histopathology, and immune parameters, would help in revealing relationships between stressor impact and population status. Toxic pressure was assessed by the toxic unit approach, which gives an integrative estimate of toxic effect concentrations and by measuring the biomarkers cytochrome P4501A and vitellogenin, which indicate exposure to bioavailable arylhydrocarbon- or estrogen receptor ligands. Parasite pressure was estimated by determining abundance and species composition of ecto- and endoparasites of chub. Chub abundance was high upstream in the Bílina, low to zero in the middle stretches, and increased again downstream. Toxic pressure increased in the downstream direction, while parasite intensity decreased in this direction. Health status of chub did not differ clearly between up-, middle-, and downstream sites. Thus, it appears that neither toxic pressure nor parasite pressure nor their combination translates into a change of chub health status. By using varied assessment tools, this study provides evidence against a presumed causative role of toxicants impairing the fish ecological status of the Bílina River.

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Section: Discussionsupporting

confidence: 72%

Assessing relationships between chemical exposure, parasite infection, fish health, and fish ecological status: A case study using chub (Leuciscus cephalus) in the Bílina River, Czech Republic

Wenger

Ondračková

Machala

et al. 2009

Enviro Toxic and Chemistry

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show abstract

“…5D, ANOVA, P = 0.151; pairwise comparison of independent samples, P = 0.05). Alternative complement was actually increased in gilthead sea bream infected by E. leei (Cuesta et al, 2006b) and is responsible for the killing in vitro of several monogeneans parasites (Buchmann, 1998;Harris et al, 1998;Rubio-Godoy et al, 2004). However, after a long exposure to the parasites, usually fish complement activity is reduced (Álvarez-Pellitero, 2008), which can be interpreted either as an increased consumption of the complement or as an efficient evasion mechanism of the parasite (e.g.…”

Section: Antibacterial and Anti-parasitic Activitymentioning

confidence: 99%

Strong effect of long-term Sparicotyle chrysophrii infection on the cellular and innate immune responses of gilthead sea bream, Sparus aurata

Henry

Nikoloudaki

Tsigenopoulos

et al. 2015

Developmental & Comparative Immunology

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“…data). Differences in resistance to infection shown by diverse salmonid species have been linked to variation in the ability of immune factors to destroy monogenean parasites; examples include differential resistance to Gyrodactylus derjavini Mikhailov, 1975(see Buchmann & Uldal 1997 and to Discocotyle sagittata (Leuckart, 1842) Diesing, 1850 (see Rubio-Godoy et al 2004). Similarly, yellowtail Seriola quinqueradiata Temminck & Schlegel, amberjack S. dumerili, and Japanese flounder P. olivaceus differ in their susceptibility to infection by N. girellae (see Ohno et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Comparative susceptibility of two different genetic types of tilapia to Neobenedenia sp. (Monogenea)

Rubio‐Godoy

Montiel-Leyva²,

Martínez-Hernández³

2011

Dis. Aquat. Org.

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Two different genetic types of tilapia, Mozambique tilapia Oreochromis mossambicus (MT), and Pargo-UNAM (PU; a synthetic hybrid whose genetic composition is 50% Florida red tilapia, 25% Rocky Mountain tilapia, and 25% red variant Oreochromis niloticus), were acclimatized to salinity and exposed to seawater from the Gulf of Mexico off the port of Veracruz, Mexico. Both fish types were infected by the monogenean ectoparasite Neobenedenia sp. and were killed within 2 to 3 wk. A crude worm extract was prepared from whole specimens collected during the original outbreak and used to immunize naïve hosts of the same 2 types of tilapia. Immunized fish were then exposed to seawater, which resulted in Neobenedenia sp. infection. Immunization did not confer any protection against Neobenedenia sp. infection. However, the experiment enabled detailed analysis of the dynamics of infection and comparison of the effects of the parasite on the 2 host types. Although both tilapia types exhibited similar resistance to infection (as they harbored similar parasite burdens in the early phase of infection), PU is less tolerant to Neobenedenia sp., as a mean parasite abundance of ca. 50 worms fish -1 killed all hosts within a fortnight, while 22% of MT survived up to 3 wk, harboring a mean parasite abundance of ca. 900 worms fish -1. Our results suggest that, as reported elsewhere, Neobenedenia sp. could negatively affect mariculture off the Mexican coast of the Gulf of Mexico.

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Evidence of complement-mediated killing of Discocotyle sagittata (Platyhelminthes, Monogenea) oncomiracidia

Cited by 32 publications

References 24 publications

Assessing relationships between chemical exposure, parasite infection, fish health, and fish ecological status: A case study using chub (Leuciscus cephalus) in the Bílina River, Czech Republic

Assessing relationships between chemical exposure, parasite infection, fish health, and fish ecological status: A case study using chub (Leuciscus cephalus) in the Bílina River, Czech Republic

Strong effect of long-term Sparicotyle chrysophrii infection on the cellular and innate immune responses of gilthead sea bream, Sparus aurata

Comparative susceptibility of two different genetic types of tilapia to Neobenedenia sp. (Monogenea)

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