Evidence map›Paper›PMID 27821054›Full record

ArticleBMC microbiology2016

Determination of virulence and antibiotic resistance pattern of biofilm producing Listeria species isolated from retail raw milk.

Kamelia M Osman, Ahmed Samir, Usama H Abo-Shama, Essam H Mohamed, Ahmed Orabi, Tara Zolnikov

Open access · goldAbstract read
In one paragraph

Article in BMC microbiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 2 pooled it
4.1field-weighted citation impact, top 7% of its field
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

19 citing papers in PubMed, 2 syntheses or guidelines pooled it, 45 citations in OpenAlex.

  1. Antimicrobial-resistant foodborne pathogens in the Middle East: a systematic review.Environmental science and pollution research international · 2021
    Pooled it
  2. Pooled it
  3. Article
  4. Detection and Molecular Characterization ofVeterinary medicine international · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Newly Emerging MDRInfection and drug resistance · 2022
    Article
  9. First substantiation of clinico-molecular investigation of pathogenicIranian journal of veterinary research · 2022
    Article
  10. Bioactivity of Essential Oils for Mitigation ofFoods (Basel, Switzerland) · 2021
    Article
  11. Article
  12. Virulence Characterization ofPathogens (Basel, Switzerland) · 2020
    Article
  13. Article
  14. Article
  15. Article
  16. PersistentPathogens (Basel, Switzerland) · 2019
    Article
  17. Article
  18. Article
  19. Review
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 at 4 institutions in 2 countries.

Kamelia M OsmanDepartment of Microbiology, Faculty of Veterinary Medicine, Cairo University, PO Box 12211, Cairo, Egypt. kamelia-osman@hotmail.com.
Ahmed SamirDepartment of Microbiology, Faculty of Veterinary Medicine, Cairo University, PO Box 12211, Cairo, Egypt.
Usama H Abo-ShamaDepartment of Microbiology, Faculty of Veterinary Medicine, Sohag University, Sohag, Egypt.
Essam H MohamedDepartment of Bacteriology, Mycology and Immunology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, 44519, Egypt.
Ahmed OrabiDepartment of Microbiology, Faculty of Veterinary Medicine, Cairo University, PO Box 12211, Cairo, Egypt.
Tara ZolnikovNorth Dakota State University, Developmental Science, Fargo, ND, 58102, USA.
Cairo University · EGNorth Dakota State University · USSohag University · EGZagazig University · EG

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundOne of the foodborne pathogens is Listeria monocytogenes, which causes serious invasive illness in elderly and immunocompromised patients, pregnant women, newborns and infants ranking second after salmonellosis because of its high case fatality rate. Listerial cow mastitis marked by abnormal milk, increased cell counts and reduced production has not been reported. Therefore, apparently healthy cows can be reservoirs of L. monocytogenes. A number of 203 udder milk samples from apparently healthy animals (buffalo, n = 100; cow, n = 103) were collected and tested for Listeria. Isolated colonies on the PALCAM agar were Listeria species confirmed according to their biochemical and the Christie-Atkins-Munch-Petersen (CAMP) reactions. The Listeria species pathogenicity of was tested by phosphatidylinositol-specific phospholipase C, DL-alanine-β-naphthylamide HCl, Dalanine-p-nitroanilide tests, chick embryo, mice inoculation tests, Vero cell cytotoxicity and biofilm formation. The virulence-associated genes, hlyA, plcB, actA and iap associated with Listeria were molecularly assayed.

resultsThe 17 isolated Listeria spp. represented a prevalence rate of 8.4 %. Of these 3 (1.4 %), 2 (1 %), 5 (2.5 %), 4 (2 %) and 3 (1.5 %) were confirmed as L. monocytogenes, L. innocua, L. welshimeri, L. seelegeri, respectively. While the L. monocytogenes isolate displayed all the four virulence-associated genes, L. seelegeri carried the hlyA gene only. The L. monocytogenes had a strong in vitro affinity to form a biofilm, in particular serotype 4 which is associated with human infections. L. monocytogenes showed resistance for 9/27 antibiotics.

conclusionsThe biofilm forming capability of the Listeria spps. makes them particularly successful in colonizing surfaces within the host thus being responsible for persistence infections and due to their antimicrobial resistant phenotype that this structure confers. In addition, strains belonging to serotypes associated with human infections and characterized by pathogenic potential (serotype 4) are capable to persist within the processing plants forming biofilm and thus being a medical hazard.

Indexed as

BiofilmsDrug Resistance, BacterialAnimalsAnti-Bacterial AgentsBacterial ProteinsCattleListeriaMilkVirulenceVirulence FactorsAnti-Bacterial AgentsBacterial ProteinsVirulence FactorsAntibiotic resistanceBiofilm formationBuffaloCowListeria speciesVirulence genes

Identifiers

PMID27821054
PMCPMC5100219
OpenAlexW2555255581

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.