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Effect of arsenic and cyanobacterial co-exposure on pathological, haematological and immunological parameters of rainbow trout (Oncorhynchus mykiss).
Neuro Endocrinol Lett. 2015; 36 Suppl 1:57-63.NE

Abstract

OBJECTIVES

Under environmental conditions, fish are simultaneously exposed to multiple stressors. This study provides new knowledge on the effects of controlled exposure to multiple stressors, namely cyanobacterial biomass and food contaminated with arsenic.

METHODS

Rainbow trout were divided into six groups of 25 fish and exposed to different contaminant combinations for 30 days: 1) control group, 2) cyanobacterial biomass, 3 & 4) two groups exposed to arsenic at concentrations of 5 mg.kg(-1) and 50 mg.kg(-1) fish feed, and 5 & 6) two groups exposed to cyanobacterial biomass and arsenic combined. We then evaluated pathological, haematological and immunological parameters at 10, 20 and 30 days after exposure.

RESULTS

Marked gross pathological findings were present in groups exposed to arsenic and arsenic/cyanobacteria after 30 days. A strong decrease in haemoglobin concentration was observed in all experimental groups receiving arsenic after 10 days exposure. Total leukocyte count increased markedly in fish exposed to cyanobacterial biomass, and to higher arsenic concentrations by the end of the experiment. Neutrophils decreased significantly at the end of exposure. Similarly, exposure to cyanobacteria and/or arsenic led to suppression of opsonised zymosan particle-induced neutrophil respiratory bursts.

CONCLUSIONS

Our results demonstrate that the effects of exposure to toxic cyanobacterial biomass and arsenic on fish are enhanced when the contaminants are combined. In particular, long-term exposure led to disturbances in the white blood-cell count. Modulation of phagocytosis, which is the first line of defence against invading pathogens, suggests that the combined action leads to a decreased ability to control infection.

Authors+Show Affiliations

Department of Ecology and Diseases of Game, Fish and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Czech Republic.Department of Ecology and Diseases of Game, Fish and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Czech Republic.Department of Zoology, Fishery, Hydrobiology and Bee Keeping, Faculty of Agronomy, Mendel University in Brno, Brno, Czech Republic.Department of Zoology, Fishery, Hydrobiology and Bee Keeping, Faculty of Agronomy, Mendel University in Brno, Brno, Czech Republic.Department of Ecology and Diseases of Game, Fish and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Czech Republic.Department of Ecology and Diseases of Game, Fish and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Czech Republic.RECETOX (Research Centre for Toxic Compounds in the Environment), Faculty of Science Brno, Masaryk University, Czech Republic.RECETOX (Research Centre for Toxic Compounds in the Environment), Faculty of Science Brno, Masaryk University, Czech Republic.Department of Ecology and Diseases of Game, Fish and Bees, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Czech Republic.RECETOX (Research Centre for Toxic Compounds in the Environment), Faculty of Science Brno, Masaryk University, Czech Republic.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26757114

Citation

Palikova, Miroslava, et al. "Effect of Arsenic and Cyanobacterial Co-exposure On Pathological, Haematological and Immunological Parameters of Rainbow Trout (Oncorhynchus Mykiss)." Neuro Endocrinology Letters, vol. 36 Suppl 1, 2015, pp. 57-63.
Palikova M, Papezikova I, Kopp R, et al. Effect of arsenic and cyanobacterial co-exposure on pathological, haematological and immunological parameters of rainbow trout (Oncorhynchus mykiss). Neuro Endocrinol Lett. 2015;36 Suppl 1:57-63.
Palikova, M., Papezikova, I., Kopp, R., Mares, J., Markova, Z., Navratil, S., Adamovsky, O., Kohoutek, J., Navratil, L., & Blaha, L. (2015). Effect of arsenic and cyanobacterial co-exposure on pathological, haematological and immunological parameters of rainbow trout (Oncorhynchus mykiss). Neuro Endocrinology Letters, 36 Suppl 1, 57-63.
Palikova M, et al. Effect of Arsenic and Cyanobacterial Co-exposure On Pathological, Haematological and Immunological Parameters of Rainbow Trout (Oncorhynchus Mykiss). Neuro Endocrinol Lett. 2015;36 Suppl 1:57-63. PubMed PMID: 26757114.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of arsenic and cyanobacterial co-exposure on pathological, haematological and immunological parameters of rainbow trout (Oncorhynchus mykiss). AU - Palikova,Miroslava, AU - Papezikova,Ivana, AU - Kopp,Radovan, AU - Mares,Jan, AU - Markova,Zdenka, AU - Navratil,Stanislav, AU - Adamovsky,Ondrej, AU - Kohoutek,Jiri, AU - Navratil,Lukas, AU - Blaha,Ludek, PY - 2015/07/18/received PY - 2015/09/09/accepted PY - 2016/1/13/entrez PY - 2016/1/13/pubmed PY - 2016/4/22/medline SP - 57 EP - 63 JF - Neuro endocrinology letters JO - Neuro Endocrinol. Lett. VL - 36 Suppl 1 N2 - OBJECTIVES: Under environmental conditions, fish are simultaneously exposed to multiple stressors. This study provides new knowledge on the effects of controlled exposure to multiple stressors, namely cyanobacterial biomass and food contaminated with arsenic. METHODS: Rainbow trout were divided into six groups of 25 fish and exposed to different contaminant combinations for 30 days: 1) control group, 2) cyanobacterial biomass, 3 & 4) two groups exposed to arsenic at concentrations of 5 mg.kg(-1) and 50 mg.kg(-1) fish feed, and 5 & 6) two groups exposed to cyanobacterial biomass and arsenic combined. We then evaluated pathological, haematological and immunological parameters at 10, 20 and 30 days after exposure. RESULTS: Marked gross pathological findings were present in groups exposed to arsenic and arsenic/cyanobacteria after 30 days. A strong decrease in haemoglobin concentration was observed in all experimental groups receiving arsenic after 10 days exposure. Total leukocyte count increased markedly in fish exposed to cyanobacterial biomass, and to higher arsenic concentrations by the end of the experiment. Neutrophils decreased significantly at the end of exposure. Similarly, exposure to cyanobacteria and/or arsenic led to suppression of opsonised zymosan particle-induced neutrophil respiratory bursts. CONCLUSIONS: Our results demonstrate that the effects of exposure to toxic cyanobacterial biomass and arsenic on fish are enhanced when the contaminants are combined. In particular, long-term exposure led to disturbances in the white blood-cell count. Modulation of phagocytosis, which is the first line of defence against invading pathogens, suggests that the combined action leads to a decreased ability to control infection. SN - 0172-780X UR - https://www.unboundmedicine.com/medline/citation/26757114/Effect_of_arsenic_and_cyanobacterial_co_exposure_on_pathological_haematological_and_immunological_parameters_of_rainbow_trout__Oncorhynchus_mykiss__ L2 - https://medlineplus.gov/arsenic.html DB - PRIME DP - Unbound Medicine ER -