Characterization of a Chlamydia pneumoniae strain isolated from a 57-year-old man

N Miyashita1, Y Kubota, M Kimura

  • 1Department of Microbiology, Kawasaki Medical School, Okayama, Japan.

Insights

Researchers isolated a new Chlamydia pneumoniae strain, KKpn-15, from an adult with acute bronchitis. This strain is valuable for diagnosing and studying C. pneumoniae infections.

Area of Science:

  • Microbiology
  • Infectious Diseases

Background:

  • Chlamydia pneumoniae isolation, particularly from elderly individuals, presents significant challenges.
  • Acute bronchitis is a common respiratory illness that can be caused by various pathogens.

Observation:

  • A novel chlamydial strain, designated KKpn-15, was successfully isolated from a 57-year-old male patient with acute bronchitis.
  • The KKpn-15 strain was compared to established strains of Chlamydia pneumoniae, Chlamydia trachomatis, and Chlamydia psittaci.

Findings:

  • Biological properties of KKpn-15, including elementary body (EB) morphology, inclusion bodies, and EB protein immunochemistry, were investigated.
  • The KKpn-15 strain was confirmed as a member of the Chlamydia pneumoniae species.
  • Organisms of the KKpn-15 strain demonstrated utility as an antigen for serodiagnosis and epidemiological studies of C. pneumoniae infections.

Implications:

  • The isolation of KKpn-15 provides a valuable new resource for Chlamydia pneumoniae research.
  • This strain can enhance the accuracy and efficiency of diagnosing C. pneumoniae infections.
  • KKpn-15 aids in understanding the epidemiology of Chlamydia pneumoniae, facilitating public health strategies.

Related Concept Videos

Pneumonia I: Introduction01:30

Pneumonia I: Introduction

Pneumonia is an acute respiratory infection that targets the lungs, specifically the alveoli. These tiny air sacs, essential for oxygen exchange, become engorged with pus and fluid, severely hindering breathing, decreasing oxygen absorption, and causing significant pain and discomfort during respiration.
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
Pneumonia II: Pathophysiology01:29

Pneumonia II: Pathophysiology

The pathophysiology of pneumonia involves the following steps:
Pneumonia III: Complications and Assessment01:30

Pneumonia III: Complications and Assessment

Pneumonia poses the potential for numerous complications that warrant consideration. These complications include the following:
Bacterial Phylum Chlamydiae01:29

Bacterial Phylum Chlamydiae

The phylum Chlamydiae or Chlamydiota is composed of a single order, Chlamydiales. This phylum consists entirely of obligate intracellular parasites that infect eukaryotic hosts. While human pathogens within this group have been studied extensively, the phylum encompasses many species capable of interacting with various eukaryotic organisms. Members of Chlamydiae are typically small cocci, approximately 0.5 μm in diameter, and exhibit a distinctive developmental cycle. As is characteristic of...
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...
Pneumonia I: Introduction01:29

Pneumonia I: Introduction

Pneumonia is an infection of the lower respiratory tract that leads to inflammation of the lung parenchyma, often resulting in the accumulation of inflammatory exudate in the alveoli and airways. Unlike the watery, low-protein fluid exudate in pulmonary edema, the exudate in this case is a thick fluid rich in immune cells, proteins, and debris produced during infection and inflammation.This impairs gas exchange and can lead to consolidation of lung tissue. The infection may be caused by a...