Related Experiment Video

Updated: Oct 4, 2026

Assay Development for High-Throughput Drug Screening Against Mycobacteria
07:50

Assay Development for High-Throughput Drug Screening Against Mycobacteria

Published on: October 25, 2024

Activity of telithromycin, a new ketolide antibacterial, against atypical and intracellular respiratory tract

M R Hammerschlag1, P M Roblin, C M Bébéar

  • 1Division of Infectious Diseases, Department of Pediatrics, Box 49, SUNY Downstate Medical Center, 450 Clarkson Avenue, Brooklyn, NY 11203-2098, USA. mhammerschlag@pol.net

The Journal of Antimicrobial Chemotherapy
|September 22, 2001
PubMed

Insights

Telithromycin, a novel ketolide antibiotic, demonstrates high efficacy against common and atypical respiratory pathogens. This makes it a promising treatment option for community-acquired pneumonia (CAP) and respiratory tract infections (RTIs).

Area of Science:

  • Pharmacology and Microbiology
  • Infectious Diseases

Background:

  • Community-acquired pneumonia (CAP) is frequently caused by atypical and intracellular pathogens, including Mycoplasma pneumoniae, Legionella spp., and Chlamydia spp.
  • Clinical and radiological features often fail to accurately predict the specific pathogen involved in CAP.
  • Empirical antibiotic treatment is common due to the diagnostic challenges and time constraints associated with identifying atypical pathogens.

Purpose of the Study:

  • To review the evidence supporting the efficacy of telithromycin against atypical and intracellular respiratory pathogens.
  • To evaluate telithromycin's suitability as a broad-spectrum agent for treating community-acquired respiratory tract infections (RTIs).

Main Methods:

  • Systematic review of existing scientific literature and clinical studies.
  • Analysis of in vitro and in vivo data on telithromycin's antimicrobial activity.
  • Examination of evidence regarding telithromycin's effectiveness against common and atypical respiratory pathogens.

Main Results:

  • Telithromycin exhibits excellent activity against common bacterial pathogens associated with RTIs, including resistant strains.
  • Significant evidence demonstrates telithromycin's high level of activity against atypical and intracellular respiratory pathogens.
  • The drug is specifically designed for the treatment of community-acquired RTIs.

Conclusions:

  • Telithromycin provides broad-spectrum coverage, effectively targeting both typical and atypical bacterial pathogens implicated in CAP.
  • Its established efficacy against resistant strains and atypical pathogens positions telithromycin as a key therapeutic option for respiratory tract infections.
  • The ketolide class, represented by telithromycin, offers a valuable addition to the armamentarium against respiratory bacterial infections.

More Related Videos

Identification of Potential Anti-TB Candidates: A Step-by-Step Guide to Synthesis, MIC Determination, and Cytotoxicity Assessment in Mammalian Cells10:24

Identification of Potential Anti-TB Candidates: A Step-by-Step Guide to Synthesis, MIC Determination, and Cytotoxicity Assessment in Mammalian Cells

Published on: May 22, 2026

High Throughput, Real-time, Dual-readout Testing of Intracellular Antimicrobial Activity and Eukaryotic Cell Cytotoxicity09:09

High Throughput, Real-time, Dual-readout Testing of Intracellular Antimicrobial Activity and Eukaryotic Cell Cytotoxicity

Published on: November 16, 2016

Related Concept Videos

Inhibitors of Bacterial DNA Synthesis01:28

Inhibitors of Bacterial DNA Synthesis

Bacterial pathogens depend on precise and efficient DNA replication to sustain infection. Two type II topoisomerases—DNA gyrase and topoisomerase IV—are critical to this process, as they resolve DNA supercoiling and unlink chromosomes during replication. Fluoroquinolones, synthetic derivatives of quinolones, exploit this mechanism by stabilizing the transient DNA–enzyme cleavage complex, preventing strand religation, and causing lethal double-strand breaks. These antibiotics are selectively...
Atypical Pneumonia01:14

Atypical Pneumonia

Atypical pneumonia, often caused by Mycoplasma pneumoniae, is a form of pulmonary infection that differs from the classical presentation of bacterial pneumonia in both its cause and clinical symptoms. Mycoplasma pneumoniae is a pleomorphic bacterium notable for its lack of a rigid cell wall. This structural characteristic imparts resistance to beta-lactam antibiotics and significantly influences the bacterium’s behavior within the human host.Other pathogens responsible for the disease include...
Antimicrobial Effectiveness01:28

Antimicrobial Effectiveness

The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...
Inhibitors of Gram-positive Cell Wall Synthesis01:23

Inhibitors of Gram-positive Cell Wall Synthesis

Bacterial cell walls are typically rigid structures composed mainly of peptidoglycan, a mesh-like polymer that provides mechanical strength and maintains cell shape. The synthesis of peptidoglycan is a crucial process in bacterial growth and serves as a primary target for many antibiotics.Mechanism of Action of Beta-Lactam AntibioticsBeta-lactam antibiotics, such as penicillin, inhibit peptidoglycan synthesis in actively growing cells. These antibiotics share a characteristic four-membered...
Inhibitors of Bacterial Protein Synthesis01:25

Inhibitors of Bacterial Protein Synthesis

Aminoglycosides constitute a highly potent class of bactericidal antibiotics that exert their antimicrobial effects by targeting the bacterial ribosome, specifically disrupting protein synthesis. These polycationic molecules consist of amino-modified sugars linked via glycosidic bonds to an aminocyclitol core such as 2-deoxystreptamine or streptamine. Their strong positive charges facilitate tight binding to the negatively charged phosphate backbone of ribosomal RNA (rRNA), primarily at the 16S...
Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...