Evidence map›Paper›PMID 24648562›Full record

ArticleJournal of clinical microbiology2014

Multilocus sequence typing of serially collected isolates of Cryptococcus from HIV-infected patients in South Africa.

Marelize Van Wyk, Nelesh P Govender, Thomas G Mitchell, Anastasia P Litvintseva, GERMS-SA

Abstract read
In one paragraph

Article in Journal of clinical microbiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed, 1 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

37 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Guideline
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  6. Vaccination with aInfection and immunity · 2023
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  9. Journal of fungi (Basel, Switzerland) · 2022
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  10. ExploringJournal of fungi (Basel, Switzerland) · 2022
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  11. Article
  12. Review
  13. Review
  14. The Predominance of a Specific Genotype ofComputational and mathematical methods in medicine · 2022
    Article
  15. Article
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  18. Review
  19. Article
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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

5 authors.

Marelize Van WykNational Institute for Communicable Diseases, Centre for Opportunistic, Tropical and Hospital Infections, Johannesburg, South Africa.
Nelesh P GovenderNational Institute for Communicable Diseases, Centre for Opportunistic, Tropical and Hospital Infections, Johannesburg, South Africa Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
Thomas G MitchellDepartment of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA tom.mitchell@duke.edu.
Anastasia P LitvintsevaDepartment of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA.
GERMS-SA

Funding

Evolution of Cryptococcus neoformans Strains from Patients with HIV/AIDSR01AI093257 · NIAID · DUKE UNIVERSITY · PI PERFECT, JOHN R. · 2011 to 2022
$3.8M
STUDIES OF CRYPTOCOCCUS NEOFORMANTS ASSOCIATED WITH AIDSR01AI025783 · NIAID · DUKE UNIVERSITY · PI MITCHELL, THOMAS G. · 1987 to 2010
$2.1M
NIAID NIH HHS R01 AI025783NIAID NIH HHS R01 AI093257NIAID NIH HHS R01 AI 25783NIAID NIH HHS R01 AI 93257PHS HHS U60/CCU022088
6 · The paper itself

Abstract

Patients with cryptococcal meningitis in sub-Saharan Africa frequently relapse following treatment. The natural history and etiology of these recurrent episodes warrant investigation. Here, we used multilocus sequence typing (MLST) to compare the molecular genotypes of strains of Cryptococcus neoformans and Cryptococcus gattii isolated from serial episodes of cryptococcal meningitis that were separated by at least 110 days. The most common MLST genotypes among the isolates were the dominant global clinical genotypes (M5 and M4) of molecular type VNI, as well as the VNI genotypes apparently restricted to southern Africa. In addition, there was considerable genetic diversity among these South African isolates, as 15% of the patients had unique genotypes. Eleven percent of the patients were reinfected with a genetically different strain following their initial diagnosis and treatment. However, the majority of serial episodes (89%) were caused by strains with the same genotype as the original strain. These results indicate that serial episodes of cryptococcosis in South Africa are frequently associated with persistence or relapse of the original infection. Using a reference broth microdilution method, we found that the serial isolates of 11% of the patients infected with strains of C. neoformans var. grubii with identical genotypes exhibited ≥4-fold increases in the MICs to fluconazole. Therefore, these recurrent episodes may have been precipitated by inadequate induction or consolidation of antifungal treatment and occasionally may have been due to increased resistance to fluconazole, which may have developed during the chronic infection.

Indexed as

Multilocus Sequence TypingAdolescentAdultChildCluster AnalysisCryptococcus gattiiCryptococcus neoformansFemaleGenetic VariationGenotypeHIV InfectionsHumansLongitudinal StudiesMaleMeningitis, CryptococcalMiddle Aged

Identifiers

PMID24648562
PMCPMC4042789

What OpenQuestion holds

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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.