Parasitology Research

, Volume 111, Issue 1, pp 479–485 | Cite as

Acanthamoeba spp. as vehicle and reservoir of adenoviruses

  • Patrick ScheidEmail author
  • Rafael Schwarzenberger
Short Communication


Adenoviruses are important pathogens which are responsible for human enteritic, respiratory and eye infections. These viruses have been found to be prevalent in several natural and artificial water reservoirs worldwide. Free-living amoebae (FLA) have been recovered from similar water reservoirs, and it has been shown that FLA may act as reservoirs or vehicles of various microorganisms living in the same environment. To examine the ability of FLA to harbour adenoviruses, an in vitro study was conducted. Several Acanthamoeba strains were ‘co-cultivated’ with adenoviruses (adenoviruses 11 and 41), grown on A549 cells, using a proven test protocol. After phagocytosis and ingestion, the adenoviruses could be found within the cytoplasm of the Acanthamoeba trophozoites. The intake of the viruses into the cytoplasm of the trophozoites was demonstrated in an Acanthamoeba castellanii strain with the help of fluorescence microscopy and electron microscopy. An adenovirus DFA kit, which utilizes a direct immunofluorescent antibody technique for identifying adenovirus in infected tissue cultures, was used. In our study, it was demonstrated that adenoviruses were incorporated into the host amoebae (Acanthamoeba sp. Grp. II, three strains). So far, there were only a few publications concerning the relationship of free-living amoebae and viruses; only one of these described the detection of adenoviruses within acanthamoebae with molecular biological methods. We conducted this descriptive study to further examine the association between viable adenoviruses and FLA. To our knowledge, this is the first study to demonstrate directly the adenoviruses within FLA as vectors and vehicles. Therefore, we concluded that free-living amoebae appear able to act as carriers or vectors of the adenoviruses and thus may play a certain role in the dispersal of adenoviruses.


A549 Cell Food Vacuole Acanthamoeba Keratitis Acanthamoeba Castellanii Human Lung Adenocarcinoma Cell Line 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



We thank P. Hommer, M. Ferse and M. Weber for their help and assistance during this study. We also thank Dr. B. Hauröder and Mrs Schneider for their help in obtaining the impressive electron microscopic records.


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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  1. 1.Laboratory of Medical ParasitologyCentral Institute of the Bundeswehr Medical Service KoblenzKoblenzGermany

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