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Paralytic shellfish poisonings resulting from an algal bloom in Nicaragua

Overview of attention for article published in BMC Research Notes, March 2015
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About this Attention Score

  • Above-average Attention Score compared to outputs of the same age (60th percentile)

Mentioned by

1 policy source


15 Dimensions

Readers on

41 Mendeley
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Paralytic shellfish poisonings resulting from an algal bloom in Nicaragua
Published in
BMC Research Notes, March 2015
DOI 10.1186/s13104-015-1012-4
Pubmed ID

Luis Callejas, Ana Cristian Melendez Darce, Juan Jose Amador, Laura Conklin, Nicholas Gaffga, Helen Schurz Rogers, Stacey DeGrasse, Sherwood Hall, Marie Earley, Joanne Mei, Carol Rubin, Sylvain Aldighieri, Lorraine C Backer, Eduardo Azziz-Baumgartner


During an October 2005 algal bloom (i.e., a rapid increase or accumulation in the population of algae) off the coast of Nicaragua, 45 people developed symptoms of paralytic shellfish poisoning (PSP) and one person died. PSP in humans is caused by ingestion of saxitoxin, which is a neurotoxin often associated with shellfish contaminated by algal blooms. To explore the relationship between the algal bloom and human illnesses, we performed a case-control study of residents living in a coastal island. We administered a standardized clinical questionnaire, sampled locally harvested seafood and algae, and obtained urine samples for saxitoxin testing from symptomatic and asymptomatic persons. PSP case-patients were defined as island residents who developed at least one neurological symptom during the November 4-16 intoxication period. Seafood and algal samples were analyzed for saxitoxins using the receptor-binding assay and high-performance liquid chromatography. Two urine samples were analyzed for saxitoxins using a newly developed immunoassay. Three shellfish and two algal samples tested positive for saxitoxins. Ten (9%) of 107 participants developed neurological symptoms during the specified time period and five required hospitalization. While 6 (67%) of 9 possible case-patients and 21 (21%) of 98 controls had eaten fish (p=0.008), all case-patients and 17 (17%) of controls had eaten clams (P<0.0001). The saxitoxin concentration in the urine of a hospitalized case-patient was 21 ng saxitoxin/g creatinine compared to 0.16 ng saxitoxin/g creatinine in the single control patient's urine. These findings suggest that a bloom of saxitoxin-producing algae resulted in saxitoxin accumulation in local clams and was responsible for the PSP intoxication.

Mendeley readers

The data shown below were compiled from readership statistics for 41 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Guatemala 1 2%
Unknown 40 98%

Demographic breakdown

Readers by professional status Count As %
Student > Master 11 27%
Researcher 9 22%
Student > Ph. D. Student 5 12%
Other 3 7%
Student > Bachelor 3 7%
Other 4 10%
Unknown 6 15%
Readers by discipline Count As %
Agricultural and Biological Sciences 9 22%
Medicine and Dentistry 5 12%
Environmental Science 4 10%
Biochemistry, Genetics and Molecular Biology 4 10%
Chemistry 3 7%
Other 7 17%
Unknown 9 22%

Attention Score in Context

This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 01 January 2018.
All research outputs
of 17,359,532 outputs
Outputs from BMC Research Notes
of 3,664 outputs
Outputs of similar age
of 270,595 outputs
Outputs of similar age from BMC Research Notes
of 1 outputs
Altmetric has tracked 17,359,532 research outputs across all sources so far. This one is in the 47th percentile – i.e., 47% of other outputs scored the same or lower than it.
So far Altmetric has tracked 3,664 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 5.0. This one has gotten more attention than average, scoring higher than 68% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 270,595 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 60% of its contemporaries.
We're also able to compare this research output to 1 others from the same source and published within six weeks on either side of this one. This one has scored higher than all of them