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Borrelia anserina

Borrelia anserina
Scientific classification
Kingdom: Bacteria
Phylum: Spirochaetes
Class: Spirochaetes
Order: Spirochaetales
Family: Spirochaetaceae
Genus: Borrelia
Species: B. anserina
Binomial name
Borrelia anserina
Sakharoff 1891; Bergey et al. 1925

Borrelia anserina is a helical filiform spirochete bacteria with dimensions of approximately 8-20/0,2-0,3 µm and with about 5 to 8 spirals. Their mobility is very high. B. anserina can be colored with the May Grunwald-Giemsa method.[1]



In Microbiological laboratories, B. anserina bacteria can be grown on special protein enriched mediums (rich in ovoalbumins or animal tissue (that contains Myoglobin)), in anaerobic conditions. They can also be grown in embrionated chicken eggs. The laboratory cultivation of B. anserina is rarely done and constitutes a diagnostic method in bird borreliosis and spirochetosis.[1]


B. anserina is a pathogenic agent for birds (chickens, turkeys, ducks etc.) and causes a disease called borreliosis or spirochetosis. This bacteria is transmitted from bird to bird by ticks from the Argas and Ornitodorus genus. The major symptoms of an infection with B. anserina are: anemia, diarrhea and severe neurological dysfunctions.

These two ticks represent the Argasidae “soft ticks” (Lt), and the Ixodidae “hard ticks”


  1. 1.0 1.1 Gheorghe Rapunteanu, Sorin Rapunteanu (editors) (2005). Bacteriologie Veterinara Speciala (I ed.). Editura AcademicPress, Cluj-Napoca, Romania. ISBN 973-7950-95-X. 

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