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Related Concept Videos

Sputum Studies II: Culture and Sensitivity01:20

Sputum Studies II: Culture and Sensitivity

Description
Sputum culture and sensitivity is a medical procedure used to diagnose bacterial infections in the respiratory tract and select the most appropriate antibiotics for treatment. This process involves analyzing sputum samples of thick and opaque secretions produced in the lungs and airways. These samples are collected from patients and then sent to the laboratory for analysis.
The test can identify various pathogens responsible for respiratory infections, including Streptococcus,...
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Sputum Studies I: Gram Stain, cytology, and Acid-fast smear and culture01:26

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Sputum studies are a critical part of diagnosing and treating numerous respiratory conditions. These studies involve obtaining sputum samples for analysis to identify pathogenic organisms and assess the presence of abnormal cells indicative of malignant conditions. This lesson will delve into three fundamental sputum studies: Gram Stain, Cytology, and Acid-fast Smear and Culture.
Gram Stain
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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...
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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.
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Related Experiment Video

Updated: May 18, 2026

Experimental Human Pneumococcal Carriage
07:47

Experimental Human Pneumococcal Carriage

Published on: February 15, 2013

Sampling methods for the study of pneumococcal carriage: a systematic review.

R A Gladstone1, J M Jefferies, S N Faust

  • 1Academic Unit of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, UK.

Vaccine
|September 18, 2012
PubMed
Summary

Accurate Streptococcus pneumoniae sampling is crucial for vaccine impact studies. However, variations in collection and storage methods persist, potentially skewing carriage estimates and hindering global comparisons.

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Area of Science:

  • Microbiology
  • Epidemiology
  • Public Health

Background:

  • Streptococcus pneumoniae is a significant global pathogen, necessitating accurate carriage surveillance.
  • Standardized sampling methods are vital for reliable pneumococcal disease control and vaccine efficacy evaluation.
  • Variability in sampling protocols complicates inter-laboratory comparisons and data interpretation.

Purpose of the Study:

  • To review sampling variables for Streptococcus pneumoniae carriage detection.
  • To compare methods used in studies post-World Health Organization (WHO) standard publication.
  • To identify persistent inconsistencies in pneumococcal sampling protocols.

Main Methods:

  • Systematic literature search of PubMed for studies published after the WHO standard method (February 2003).
  • Analysis of sampling and storage protocols for Streptococcus pneumoniae carriage.
  • Review focused on nasopharyngeal sampling, swab types, and transport media.

Main Results:

  • Despite the WHO standard, significant variations in sampling protocols persist.
  • Nasopharyngeal sampling is common, but swab and transport media choices differ widely.
  • Insufficient data exists to support the optimal sensitivity of any single standard method.

Conclusions:

  • Inconsistent adoption of WHO guidelines and logistical challenges affect pneumococcal carriage estimates.
  • Continued protocol variations may compromise the accuracy of vaccine impact assessments.
  • Further comparative studies are needed to optimize sampling methods for improved pneumococcal disease control.