Evidence map›Paper›PMID 23202303›Full record

ArticleToxins2012

Toxigenic potential of Aspergillus species occurring on maize kernels from two agro-ecological zones in Kenya.

Sheila Okoth, Beatrice Nyongesa, Vincent Ayugi, Erastus Kang'ethe, Hannu Korhonen, Vesa Joutsjoki

Abstract read
In one paragraph

Article in Toxins, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

31 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Geographic Profiling ofJournal of fungi (Basel, Switzerland) · 2026
    Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Toxins · 2023
    Review
  12. Article
  13. Socioeconomic Evaluation of Common Bean (Plants (Basel, Switzerland) · 2023
    Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Toxigenic SpeciesToxins · 2021
    Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Sheila OkothSchool of Biological Sciences, University of Nairobi P. O. Box 30197-00100 Nairobi, Kenya. dorisokoth@yahoo.com
Beatrice Nyongesa
Vincent Ayugi
Erastus Kang'ethe
Hannu Korhonen
Vesa Joutsjoki

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Two agro-ecological zones in Kenya were selected to compare the distribution in maize of Aspergillus spp. and their toxigenicity. These were Nandi County, which is the main maize growing region in the country but where no human aflatoxicoses have been reported, and Makueni County where most of the aflatoxicosis cases have occurred. Two hundred and fifty-five households were sampled in Nandi and 258 in Makueni, and Aspergillus was isolated from maize. Aspergillus flavus and A. parasiticus isolates were tested for the presence of aflD and aflQ genes. Positive strains were induced to produce aflatoxins on yeast extract sucrose and quantified using liquid chromatography-tandem mass spectrometry (LCMSMS). Aspergillus flavus was the most common contaminant, and the incidence of occurrence in Nandi and Makueni was not significantly different (82.33% and 73.26%, respectively). Toxigenic strains were more prevalent than non-toxigenic strains. All the toxigenic strains from Makueni were of the S-type while those from Nandi belonged to the l-type. Quantitative differences in aflatoxin production in vitro between isolates and between strains were detected with S strains producing relatively larger amounts of total aflatoxins, B toxins and lower values for G toxins. This was in accord with the frequent aflatoxicosis outbreaks in Makueni. However some L strains produced considerable amounts of B toxins. Given the widespread distribution of toxigenic strains in both regions, the risk of aflatoxin poisoning is high when favorable conditions for toxin production occur.

Indexed as

AflatoxinsAgricultureAspergillusAspergillus flavusConsumer Product SafetyDNA, FungalEnvironmental MonitoringFood ContaminationFood MicrobiologyGenes, FungalKenyaPolymerase Chain ReactionSeedsZea maysAflatoxinsDNA, Fungal

Identifiers

PMID23202303
PMCPMC3509695

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.