We use cookies to understand how you use our site and to improve your experience. This includes personalizing content and advertising. To learn more, click here. By continuing to use our site, you accept our use of cookies. Cookie Policy.

Features Partner Sites Information LinkXpress
Sign In
Advertise with Us
LGC Clinical Diagnostics

Download Mobile App




Diagnostic Test Identifies Resistance Mutation that Enables Use of Inexpensive, Single Dose Gonorrhea Drug

By LabMedica International staff writers
Posted on 17 Aug 2020
Print article
This photomicrograph of a Gram-stained urethral smear specimen, reveals some of the histopathology in an acute case of gonococcal urethritis, caused by the Gram-negative bacterium, Neisseria gonorrhoeae.  (Image courtesy of [U.S.] Centers for Disease Control and Prevention\'s Public Health Image Library)
This photomicrograph of a Gram-stained urethral smear specimen, reveals some of the histopathology in an acute case of gonococcal urethritis, caused by the Gram-negative bacterium, Neisseria gonorrhoeae. (Image courtesy of [U.S.] Centers for Disease Control and Prevention\'s Public Health Image Library)
By detecting the mutated gene responsible for resistance to the drug ciprofloxacin, it is possible to identify gonorrhea patients who can be cured by a single oral dose of this drug.

Gonorrhea, a sexually transmitted infection (STI) caused by Neisseria gonorrhoeae, remains a major public health issue worldwide with the World Health Organization (WHO) estimating that 87 million new cases of gonorrhea occur annually. Untreated gonorrhea contributes to serious reproductive and sexual health problems, including pelvic inflammatory disease, infertility, and an increased risk of transmission of human immunodeficiency virus (HIV).

Use of the inexpensive oral antibiotic ciprofloxacin to treat gonorrhea has largely been discontinued over concerns that the bacterium was becoming resistant to it. On the other hand, a molecular assay that predicts in vitro ciprofloxacin susceptibility is now available but has not been systematically studied in human infections.

Investigators at the University of California, Los Angeles (USA) used this genotypic polymerase chain reaction assay to determine the status of the N. gonorrhoeae gyrase subunit A serine 91 codon. They then conducted a multisite prospective clinical study of the efficacy of a single oral dose of ciprofloxacin 500 mg in patients with culture-positive gonorrhea. Follow-up specimens for culture were collected to determine microbiological cure five to 10 days post-treatment.

Results showed that of the 106 subjects possessing culture-positive infections with wild-type gyrA serine N. gonorrhoeae genotype, the efficacy of single-dose oral ciprofloxacin treatment was 100%. Thus, oral ciprofloxacin was highly effective against infections caused by the bacterium lacking the gyrA serine mutation.

"The new test gives doctors more choices to treat the sexually transmitted infection and could help slow down the spread of drug-resistant gonorrhea," said first author Dr. Jeffrey Klausner, professor of medicine at the University of California, Los Angeles. "Gonorrhea is one of the most common drug-resistant infections worldwide and is becoming harder to treat. Current treatment methods require an antibiotic injection, which is expensive and painful. This new test could make it easier and safer to treat gonorrhea with different antibiotics, including one pill given by mouth. Using a pill instead of a shot would also make it easier and faster to treat sex partners of patients with gonorrhea."

The paper was published in the August 7, 2020, online edition of the journal Clinical Infectious Diseases.

Related Links:

University of California, Los Angeles

Platinum Member
COVID-19 Rapid Test
OSOM COVID-19 Antigen Rapid Test
Specimen Collection & Transport
POCT Fluorescent Immunoassay Analyzer
FIA Go
Gold Member
Blood Glucose Reference Analyzer
Nova Primary

Print article

Channels

Clinical Chemistry

view channel
Image: Wireless Point-of-Care Testing for Hepatitis B Virus (Photo courtesy of Chulalongkorn University)

Wireless Hepatitis B Test Kit Completes Screening and Data Collection in One Step

Hepatitis B, a significant global health concern, is responsible for chronic liver diseases like cirrhosis and liver cancer which is one of the most common cancers worldwide. The challenge with hepatitis... Read more

Molecular Diagnostics

view channel
Image: Aptiva utilizes particle-based multi-analyte technology (PMAT) (Photo courtesy of Werfen)

Novel Immunoassays Enable Early Diagnosis of Antiphospholipid Syndrome

Antiphospholipid syndrome (APS) is an autoimmune disorder that typically presents as venous or arterial thrombosis and/or pregnancy loss. Diagnosing APS can be difficult as its symptoms often resemble... Read more

Hematology

view channel
Image: The Gazelle Hb Variant Test (Photo courtesy of Hemex Health)

First Affordable and Rapid Test for Beta Thalassemia Demonstrates 99% Diagnostic Accuracy

Hemoglobin disorders rank as some of the most prevalent monogenic diseases globally. Among various hemoglobin disorders, beta thalassemia, a hereditary blood disorder, affects about 1.5% of the world's... Read more

Pathology

view channel
Image: The photoacoustic spectral response sensing instrument is based on low-cost laser diodes (Photo courtesy of Khan et al., doi 10.1117/1.JBO.29.1.017002)

Compact Photoacoustic Sensing Instrument Enhances Biomedical Tissue Diagnosis

The pursuit of precise and efficient diagnostic methods is a top priority in the constantly evolving field of biomedical sciences. A promising development in this area is the photoacoustic (PA) technique.... Read more

Industry

view channel
Image: The companies will develop genetic testing systems based on capillary electrophoresis sequencers (Photo courtesy of 123RF)

Sysmex and Hitachi Collaborate on Development of New Genetic Testing Systems

Sysmex Corporation (Kobe, Japan) and Hitachi High-Tech Corporation (Tokyo, Japan) have entered into a collaboration for the development of genetic testing systems using capillary electrophoresis sequencers... Read more
Copyright © 2000-2024 Globetech Media. All rights reserved.