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Updated: Aug 4, 2026
Wholemount Immunohistochemistry for Revealing Complex Brain Topography
Published on: April 5, 2012
Surface topography of Acanthamoeba culbertsoni extracted from cerebrospinal fluid
Abstract:
An axenic culture of Acanthamoeba culbertsoni, strain A-1, was obtained from the American Type Culture collection and injected, via the cisterna magna, into the subarachnoid space of dogs. Attention was focused on the pleomorphic surface specialization of the pathogens suspended in cerebrospinal fluid and compared with those from trypticase soy broth suspensions. Light and scanning electron microscopic comparisons of both inoculated and stock (control) specimens demonstrated similar surface features such as microvillous-like to bleb-like microappendages projecting from variably smooth to undulating membranous exteriors. This study introduces a potentially useful morphological technique that could possibly be of assistance in the more rapid diagnosis of these infections facilitated by SEM screening of the cerebrospinal fluid.
Insights
Scanning electron microscopy (SEM) revealed similar surface features of Acanthamoeba culbertsoni in cerebrospinal fluid and broth. This suggests SEM may aid in rapid diagnosis of Acanthamoeba infections.
Area of Science:
- Microbiology
- Parasitology
- Cell Biology
Background:
- Acanthamoeba culbertsoni is an opportunistic pathogen.
- Infections can affect the central nervous system.
- Rapid diagnosis is crucial for effective treatment.
Purpose of the Study:
- To investigate the surface morphology of Acanthamoeba culbertsoni in cerebrospinal fluid (CSF).
- To compare CSF-suspended pathogens with those in a standard laboratory broth.
- To evaluate the potential of scanning electron microscopy (SEM) for diagnosing Acanthamoeba infections.
Main Methods:
- Axenic culture of Acanthamoeba culbertsoni (strain A-1) obtained from ATCC.
- Intracisternal magna injection into dogs.
- Specimen preparation for light and scanning electron microscopy (SEM).
- Morphological comparison of pathogens in CSF and trypticase soy broth.
Main Results:
- Acanthamoeba culbertsoni exhibited pleomorphic surface specializations.
- Microvillous-like to bleb-like microappendages were observed.
- Surface features in CSF were similar to those in trypticase soy broth.
- Variably smooth to undulating membranous exteriors were noted.
Conclusions:
- SEM reveals consistent surface morphology of Acanthamoeba culbertsoni in different environments.
- SEM screening of CSF is a potentially rapid diagnostic technique for Acanthamoeba infections.
- Morphological analysis can aid in understanding pathogen behavior in vivo.
