Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 240

The DOI matches its Crossref record.

Pneumonia Associated with the TWAR Strain of Chlamydia

MARRIE, THOMAS J., GRAYSTON, J. THOMAS, WANG, SAN-PIN, KUO, CHO-CHOU·1987·Annals of Internal Medicine

Abstract

From November 1981 to August 1984, 301 adult patients with community-acquired pneumonia were admitted to the major referral hospital of Nova Scotia. Serologic tests done on these patients included microimmunofluorescence using the TWAR strain of Chlamydia and all Chlamydia trachomatis serovars as antigens. The TWAR strain has been shown to cause mild pneumonia in teenagers and young adults. Of the 301 patients, 18 (6%) had serologic evidence of recent infection with the TWAR organism. Their mean age was 64 years. Pneumonia associated with the presence of acute TWAR antibody had no characteristic clinical or radiographic features when compared with pneumonia without acute chlamydia antibody. Six patients, who all had preexisting serious chronic disease, had severe illness, and 2 died. Both patients who died had complicated hospital courses and other concomitant infections. We conclude that the TWAR organism may cause pneumonia in older adults and persons with chronic diseases that require hospitalization.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.7326/0003-4819-106-4-507

Cites

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cited by

See all 240

Metadata

Authors
MARRIE, T. J., GRAYSTON, J. T., WANG, S.-P., & KUO, C.-C.
Venue
Annals of Internal Medicine
Published
1987-04-01
Volume
106
Issue
4
Pages
507-511
ISSN
  • 0003-4819 (ISSN-L)
  • 1539-3704
OpenAlex
W2017409073
Cited by
240
References
0
FWCI
15.97
Type
journal article
Language
en
Open access
closed

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Pneumonia Associated with the TWAR Strain of Chlamydia. https://app.cochat.ai/papers/10.7326/0003-4819-106-4-507
The paper
MARRIE, T. J., GRAYSTON, J. T., WANG, S.-P., & KUO, C.-C. (1987). Pneumonia Associated with the TWAR Strain of Chlamydia. Annals of Internal Medicine. https://doi.org/10.7326/0003-4819-106-4-507

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.