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Abstract:
The identity of haemophili isolated in our laboratories from eye swabs was investigated. Ten out of 114 strains belonged to capsulated types of H. influenzae. Seventy-six strains were submitted to tests for the identification of H. aegyptius (the Koch-Weeks bacillus), but none was proved to belong to this species. An unexpectedly high proportion of the haemophilus strains, including most of those with capsules, came from patients with lachrymal duct obstruction.
Insights
Researchers identified Haemophilus strains from eye swabs, finding encapsulated *Haemophilus influenzae* but no *Haemophilus aegyptius*. Many strains, particularly encapsulated ones, were linked to blocked tear ducts.
Area of Science:
- Ophthalmology
- Microbiology
Background:
- Haemophilus species are common causes of ocular infections.
- Accurate identification of Haemophilus species is crucial for appropriate treatment.
Purpose of the Study:
- To identify Haemophilus species isolated from eye swabs.
- To determine the prevalence of *Haemophilus influenzae* and *Haemophilus aegyptius* in ocular infections.
- To investigate the association between Haemophilus isolates and clinical conditions like lachrymal duct obstruction.
Main Methods:
- Isolation and identification of Haemophilus strains from eye swabs.
- Serotyping and biochemical tests for species identification.
- Clinical data review for correlation with isolate characteristics.
Main Results:
- Out of 114 strains, 10 were identified as encapsulated *Haemophilus influenzae*.
- No strains were identified as *Haemophilus aegyptius* (Koch-Weeks bacillus).
- A significant proportion of Haemophilus isolates, including encapsulated strains, originated from patients with lachrymal duct obstruction.
Conclusions:
- Encapsulated *Haemophilus influenzae* is present in ocular infections.
- The Koch-Weeks bacillus (*Haemophilus aegyptius*) was not identified in this study.
- Lachrymal duct obstruction is frequently associated with Haemophilus isolates from the eye.