Biotyping of Acinetobacter calcoaceticus using the API 2ONE system.

Area of Science:

• Microbiology
• Clinical Diagnostics
• Bacterial Identification

Background:

• Acinetobacter species are significant opportunistic pathogens, particularly in hospital settings.
• Accurate identification and typing of Acinetobacter strains are crucial for infection control and epidemiological studies.
• Non-fermentative Gram-negative bacilli present identification challenges in clinical microbiology.

Purpose of the Study:

• To evaluate the API 2ONE system for the biotyping of Acinetobacter species.
• To assess the discriminatory power and stability of the API 2ONE system for Acinetobacter typing.
• To determine the utility of the API 2ONE system in monitoring hospital-acquired infections caused by Acinetobacter.

Main Methods:

• The API 2ONE system was used to identify and biotype 122 Acinetobacter strains isolated from clinical specimens over four years.
• Strain stability was assessed over a one-year storage period.
• Biotyping results were analyzed to determine the system's discriminatory capacity and potential for epidemiological surveillance.

Main Results:

• The API 2ONE system identified 31 distinct biotypes among the 122 Acinetobacter strains.
• Biotypes demonstrated stability over a one-year storage period.
• Two predominant biotypes were identified, including a multidrug-resistant strain of Acinetobacter calcoaceticus variant anitratus.

Conclusions:

• The API 2ONE system is a rapid and effective method for biotyping Acinetobacter species.
• The system has potential as a valuable tool for Acinetobacter typing in hospital environments.
• API 2ONE aids in monitoring cross-infection and the spread of specific Acinetobacter strains, supporting infection control efforts.