Evidence map›Paper›PMID 25311695›Full record

ArticleThe American journal of tropical medicine and hygiene2015

Cryptosporidium muris: infectivity and illness in healthy adult volunteers.

Cynthia L Chappell, Pablo C Okhuysen, Rebecca C Langer-Curry, Philip J Lupo, Giovanni Widmer, Saul Tzipori

Open access · bronzeAbstract read
In one paragraph

Article in The American journal of tropical medicine and hygiene, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
2.1field-weighted citation impact, top 16% 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

23 citing papers in PubMed, 47 citations in OpenAlex.

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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

6 authors at 1 institution in 1 country.

Cynthia L ChappellCenter for Infectious Diseases, School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas; Division of Infectious Diseases, Medical School, University of Texas Health Science Center at Houston, Houston, Texas; Department of Infectious Disease and Global Health, Tufts University Cummings School of Veterinary Medicine, North Grafton, Massachusetts cynthia.l.chappell@uth.tmc.edu.
Pablo C OkhuysenCenter for Infectious Diseases, School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas; Division of Infectious Diseases, Medical School, University of Texas Health Science Center at Houston, Houston, Texas; Department of Infectious Disease and Global Health, Tufts University Cummings School of Veterinary Medicine, North Grafton, Massachusetts.
Rebecca C Langer-CurryCenter for Infectious Diseases, School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas; Division of Infectious Diseases, Medical School, University of Texas Health Science Center at Houston, Houston, Texas; Department of Infectious Disease and Global Health, Tufts University Cummings School of Veterinary Medicine, North Grafton, Massachusetts.
Philip J LupoCenter for Infectious Diseases, School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas; Division of Infectious Diseases, Medical School, University of Texas Health Science Center at Houston, Houston, Texas; Department of Infectious Disease and Global Health, Tufts University Cummings School of Veterinary Medicine, North Grafton, Massachusetts.
Giovanni WidmerCenter for Infectious Diseases, School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas; Division of Infectious Diseases, Medical School, University of Texas Health Science Center at Houston, Houston, Texas; Department of Infectious Disease and Global Health, Tufts University Cummings School of Veterinary Medicine, North Grafton, Massachusetts.
Saul TziporiCenter for Infectious Diseases, School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas; Division of Infectious Diseases, Medical School, University of Texas Health Science Center at Houston, Houston, Texas; Department of Infectious Disease and Global Health, Tufts University Cummings School of Veterinary Medicine, North Grafton, Massachusetts.
The University of Texas Health Science Center at Houston · US

Funding

Zolmitriptan challenge and human performance testingM01RR002558 · NCRR · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI SCHULTZ, STANLEY G · 1985 to 2006
$10.3M
Genetics of Cryptosporidium parvumR01AI052781 · NIAID · TUFTS UNIVERSITY BOSTON · PI WIDMER, GIOVANNI · 2002 to 2010
$1.8M
Genetics of Cryptosporidium parvumR56AI052781 · NIAID · TUFTS UNIVERSITY BOSTON · PI WIDMER, GIOVANNI · 2008 to 2008
$293k
NCRR NIH HHS M01 RR002558NCRR NIH HHS RR-02558NIAID NIH HHS AI52781NIAID NIH HHS N01 AI025466NIAID NIH HHS N01-AI-25466NIAID NIH HHS R01 AI052781NIAID NIH HHS R56 AI052781
6 · The paper itself

Abstract

Although Cryptosporidium parvum and C. hominis cause the majority of human cryptosporidiosis cases, other Cryptosporidium species are also capable of infecting humans, particularly when individuals are immunocompromised. Ten C. muris cases have been reported, primarily in human immunodeficiency virus (HIV) -positive patients with diarrhea. However, asymptomatic cases were reported in two HIV-negative children, and in another case, age and immune status were not described. This study examines the infectivity of C. muris in six healthy adults. Volunteers were challenged with 10(5) C. muris oocysts and monitored for 6 weeks for infection and/or illness. All six patients became infected. Two patients experienced a self-limited diarrheal illness. Total oocysts shed during the study ranged from 6.7 × 10(6) to 4.1 × 10(8), and the number was slightly higher in volunteers with diarrhea (2.8 × 10(8)) than asymptomatic shedders (4.4 × 10(7)). C. muris-infected subjects shed oocysts longer than occurred with other species studied in healthy volunteers. Three volunteers shed oocysts for 7 months. Physical examinations were normal, with no reported recurrence of diarrhea or other gastrointestinal complaints. Two persistent shedders were treated with nitazoxanide, and the infection was resolved. Thus, healthy adults are susceptible to C. muris, which can cause mild diarrhea and result in persistent, asymptomatic infection.

Indexed as

ImmunocompetenceAdultAnimalsCryptosporidiumGenotypeHumansImmunoglobulin GImmunoglobulin MPolymerase Chain ReactionImmunoglobulin GImmunoglobulin M

Identifiers

PMID25311695
PMCPMC4347390
OpenAlexW1979900779

What OpenQuestion holds

Textmetadata
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.