Initiation and orientation of the symbiote migration in the human body louse Pediculus humanus L.

Bacteria belonging to the genus Burkholderia are obligatory symbionts of the eriococcids Acanthococcus aceris Signoret, 1875 and Gossyparia spuria (Modeer, 1778) (Insecta, Hemiptera, Coccoidea)

“…Since the surface of such oocytes is covered with egg envelopes, the region of the nutritive cord connecting the oocyte with the tropharium, is the only place of the entry of bacteria to the oocyte cytoplasm. These results strongly confirm an earlier hypothesis (Eberle and McLean, 1982;_ Zelazowska and Bili nski, 1999;Szklarzewicz and Moskal, 2001;Pyka-Fosciak and Szklarzewicz, 2008) suggesting that the migration of the symbionts from the body cavity to ovaries is stimulated by an unknown factor produced by the ovary.…”

Germ cell cluster formation and ovariole structure in viviparous and oviparous generations of the aphid Stomaphis quercus

“…In oviparous generation bacteria invade choriogenic oocytes. Thus, our observations support earlier hypothesis that the migration of endosymbionts into ovaries is induced by an unknown factor released from the ovaries (Eberle and Mc Lean, 1982;Zelazowska and Bilinski, 1999;Szklarzewicz and Moskal, 2001;Szklarzewicz et al, 2006).…”

Symbiosis in the green leafhopper, Cicadella viridis (Hemiptera, Cicadellidae). Association in statu nascendi?

“…Like in other hemipterans with transovarial transmission of endosymbionts, in C. viridis the beginning of infestation of the ovaries by bacteria correlates with the stage of ovary development (Szklarzewicz and Moskal, 2001;Szklarzewicz et al, 2006;Michalik et al, 2009Michalik et al, , 2013. This observation strongly supports an earlier hypothesis that the migration of bacteria from bacteriomes to ovaries is stimulated by an unknown chemotactic factor released by the ovaries (Eberle and McLean, 1982).…”