Tropilaelapsosis

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The Tropilaelapsose is the infestation of bee colonies with mites of the genus Tropilaelaps . It leads to damage to the adult bees and their brood. Tropilaelapsosis occurs mainly in Asia. The disease has never occurred in Germany, but is one of the notifiable animal diseases , and in Switzerland it is one of the diseases to be monitored (group 4).

So far, Tropilaelaps clareae Delfinado & Baker, 1961 and Tropilaelaps koenigerum Delfinado-Baker & Baker, 1982 were known to cause the disease . They are elongated, brown-red colored mites that can move around quickly. T. koenigerum is about 0.7 mm, T. clareae up to 1 mm. Genetic and morphological investigations have shown that there are a total of four species, of which Tropilaelaps mercedesae and Tropilaelaps thaii were newly described by Anderson and Morgan in 2007. Up to now only T. thaii could not be detected in colonies of the western honey bee . The females lay their eggs on bee larvae shortly before they are covered and the development stages of the mites feed on them. This kills the brood of bees or the hatching bees are deformed (crooked abdomen, mutilated wings, deformed or missing limbs). The drone brood is particularly affected, where the loss can be up to 100%. After opening, the mites look for a new host. They stay on adult bees for up to 2 days ("phoretic phase"), but, unlike varroa mites , they cannot pierce the bees' chitin shell.

literature

  • Heike Aupperle: Compendium of apiculture, beekeeping and bee diseases. Verlag Wissenschaftlicher Scripten, Zwickau 2002. ISBN 3-928921-69-X . P. 58; 98-99.
  • Mercedes D. Delfinado, Edward W. Baker: Tropilaelaps a new genus of mite from the Philippines (Laelaptidae s. Lat .: Acarina) . In: Fieldiana: Zoology. 44.7 Natural History Museum, Chicago 1961. pp. 53-56.
  • Hans Werner Rath: Investigations into the parasitic mites Varroa jacobsoni oud. and Tropilaelaps clareae Delfinado & Baker and the hosts Apis cerana fabr., Apis dorsata fabr. and Apis mellifera L . Dissertation. University of Bonn, 1991.
  • Thomas Schnieder (Ed.): Veterinary Parasitology - 92 tables, 3 overviews . Parey, Stuttgart 2006. ISBN 978-3-8304-4135-9

Individual evidence

  1. ↑ Animal Disease Report 2011 by the BMELV . In: Deutsches Tierärzteblatt. (DTBL) Volume 60, May 2012, pp. 714–715.
  2. ↑ Denis L. Anderson & Mathew J. Morgan: Genetic and morphological Variation of bee-parasitic Tropilaelaps mites (Acari: Laelapidae): new and re-defined species. In: Experimental and Applied Acarology 43, 2007, pp. 1-24, doi : 10.1007 / s10493-007-9103-0 .

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