A Toxic Bloom of Anabaena Flos-Aquae in Hebgen Reservoir Montana in 1977

Juday, Richard E.; Keller, Edward J.; Horpestad, Abe; Bahls, Loren L.; Glasser, Stephen P.

doi:10.1007/978-1-4613-3267-1_8

Cited by 11 publications

(11 citation statements)

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“…flos-aquae clones from our study area produce anatoxin-a; only 8.7% (2 out of 23 clones) were able to produce anatoxin-a. This minor proportion of anatoxin-a producing clones of A. flosaquae is apparently enough to kill cattle and wildlife in Hebgen Lake, Montana, a phenomenon which has been documented on numerous occasions since the mid 1970's (Juday et al, 1981; Priscu, unpublished data). The symptoms of laziness and slight ataxia caused by the clones C-5, C-8, and C-13 may have been caused by other kinds of toxic substances that may be prevalent in those clones.…”

Section: Discussionmentioning

confidence: 92%

Isolation and verification of anatoxin-a producing clones of Anabaena flos-aquae (Lyngb.) de Breb. from a eutrophic lake

Kangatharalingam

Priscu

1993

FEMS Microbiology Ecology

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We present a technique to isolate and confirm anatoxin‐a producing clones (single trichome‐isolates) of Anabaena flos‐aquae (Lyngb.) de Breb. from blooms of this cyanobacterium. A single trichome is isolated from a field sample and grown in ASM medium. Single trichomes are then isolated from this culture and grown in ASM medium to produce single clone cultures. Mouse bioassay, and thin‐layer chromatography (TLC) using purified anatoxin‐a as reference is then used to confirm the anatoxin‐a producing clones. Using this methodology, Anabaena flos‐aquae samples collected during July 1991 from Hebgen Lake, Montana, were found to contain only 8.7% anatoxin‐a producing clones. This minor proportion of anatoxin‐a producing clones apparently accounts for the anatoxin‐a produced by the entire population of A. flos‐aquae. Our technique is simple and reproducible. A selected clone of A. flos‐aquae that produces anatoxin‐a and one that does not produce anatoxin‐a were deposited in the UTEX culture collection, University of Texas at Austin.

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Section: Discussionmentioning

confidence: 92%

Isolation and verification of anatoxin-a producing clones of Anabaena flos-aquae (Lyngb.) de Breb. from a eutrophic lake

Kangatharalingam

Priscu

1993

FEMS Microbiology Ecology

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Section: Discussionmentioning

confidence: 99%

“…We found 18 reports of 29 or more events where animal illnesses and deaths served as potential sentinel events for human health risks related to harmful cyanobacteria [ 36 , 40 , 42 , 50 , 74 , 77 , 85 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 , 102 ]. Among 15 of 18 reports describing 25 or more events, cyanobacteria-associated animal illness clearly preceded any reports of human illness [ 36 , 42 , 50 , 77 , 85 , 92 , 93 , 94 , 95 , 96 , 97 , 99 , 100 , 101 , 102 ]. Among 11 of 18 reports describing 15 or more events, cyanobacteria-associated animal illness or death was recognized, authorities were alerted to the presence of contaminated water, and action was taken to warn people of the risk associated with exposure to potentially toxic water [ 42 , 77 , 85 , 92 , 93 , 94 , 95 , 96 , 97 , 100 , 101 ].…”

Section: Discussionmentioning

confidence: 99%

One Health and Cyanobacteria in Freshwater Systems: Animal Illnesses and Deaths Are Sentinel Events for Human Health Risks

Hilborn

Beasley

2015

Toxins

133

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Harmful cyanobacterial blooms have adversely impacted human and animal health for thousands of years. Recently, the health impacts of harmful cyanobacteria blooms are becoming more frequently detected and reported. However, reports of human and animal illnesses or deaths associated with harmful cyanobacteria blooms tend to be investigated and reported separately. Consequently, professionals working in human or in animal health do not always communicate findings related to these events with one another. Using the One Health concept of integration and collaboration among health disciplines, we systematically review the existing literature to discover where harmful cyanobacteria-associated animal illnesses and deaths have served as sentinel events to warn of potential human health risks. We find that illnesses or deaths among livestock, dogs and fish are all potentially useful as sentinel events for the presence of harmful cyanobacteria that may impact human health. We also describe ways to enhance the value of reports of cyanobacteria-associated illnesses and deaths in animals to protect human health. Efficient monitoring of environmental and animal health in a One Health collaborative framework can provide vital warnings of cyanobacteria-associated human health risks.

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“…The harmful effects of anatoxin-a have been evidenced by several animal fatalities as cattle and dogs in USA and Finland (Juday et al 1981;Sivonen et al 1989Sivonen et al , 1990Edwards et al 1992). This has called attention for the putative public health risk that might be associated with this neurotoxin.…”

Section: Introductionmentioning

confidence: 97%

Production of anatoxin-a by cyanobacterial strains isolated from Portuguese fresh water systems

et al. 2009

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The occurrence of anatoxin-a in several freshwater systems in Portugal and its production by Portuguese cyanobacterial strains, after cultivation in laboratory, were studied. Surface water samples from 9 water bodies, for recreational and human consumption usage, were surveyed for anatoxin-a presence and for obtaining cultures of pure cyanobacterial strains. Anatoxin-a analysis was performed by high performance liquid chromatography (HPLC) with fluorescence detection (FLD) followed by Mass Spectrometry (MS) confirmation. No anatoxin-a was detected in all the natural water samples (limit of detection (LOD) = 25 ng l(-1)) but among the 22 isolated cyanobacterial strains, 13 could produce anatoxin-a in laboratory conditions (LOD = 3 ng g(-1) dw). This proportion of anatoxin-a producing strains (59.1%) in laboratory is discussed considering the hypothesis that anatoxin-a is a more frequent metabolite in cyanobacteria than it was thought before and making its occurrence in Portuguese freshwaters almost certain. Therefore, health and ecological risks caused by anatoxin-a in Portugal, should be seriously considered.

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A Toxic Bloom of Anabaena Flos-Aquae in Hebgen Reservoir Montana in 1977

Cited by 11 publications

References 1 publication

Isolation and verification of anatoxin-a producing clones of Anabaena flos-aquae (Lyngb.) de Breb. from a eutrophic lake

Isolation and verification of anatoxin-a producing clones of Anabaena flos-aquae (Lyngb.) de Breb. from a eutrophic lake

One Health and Cyanobacteria in Freshwater Systems: Animal Illnesses and Deaths Are Sentinel Events for Human Health Risks

Production of anatoxin-a by cyanobacterial strains isolated from Portuguese fresh water systems

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