E. Vretou, H. Loutrari, L. Mariani, K. Costelidou, P. Eliades, G. Conidou, S. Karamanou, O. Mangana, V. Siarkou and O. Papadopoulos. Diversity among abortive strains of Chlamydia psittaci demonstrated by inclusion morphology, polypeptide profiles and monoclonal antibodies. Vet. Microbiol. 51, (1996) 275-289.
 
V. Salti-Montesanto, E. Tsoli, P. Papavassiliou, E. Psarrou, B. K. Markey, G. E. Jones and E. Vretou. Diagnosis of ovine enzootic abortion, using a competitive ELISA based on monoclonal antibodies against the variable segments 1 and 2 of the major outer membrane protein of   Chlamydia psittaci serotype 1. Amer. J. Vet Res. 58, (1997) 228-235.
 
P. Giannikopoulou, L. Bini, Ph. D. Simitsek, V. Pallini and E. Vretou. Two-dimensional electrophoretic analysis of the protein family at 90 kDa of abortifacient Chlamydia psittaci. Electrophoresis, 18, (1997) 2104-2108.
 
D. Longbottom, J. Findlay, E. Vretou, S. Dunbar and G. Jones. Immunoelectron microscopic localisation of the omp 90 protein family on the outer membrane surface of Chlamydia psittaci. FEMS Microbiol. Lett. 164, (1998) 111-117.
 
P. Gut-Zangger, R. Thoma, E. Vretou, E. Psarrou, I. Schiller and A. Pospischil. Chlamydienabort beim Schaf: Mőglichkeiten der serologischen Diagnostik mit einem kompetitiven ELISA und Einblick in die epidemiologische Situation in der Schweiz. Schweiz. Arch.  Tierheilk. 141, (1999) 361-366.
 
B.L. Liu, J.S. Everson, B. Fane, P. Giannikopoulou, E. Vretou, P.R Lambden and I.N. Clarke Molecular characterization of a bacteriophage (Chp2) from Chlamydia psittaci J. Virol. 74, (2000) 3464-3469.
 
E. Vretou, E. Psarrou, M. Kaisar, I. Vlisidou, V. Salti-Montesanto, D. Longbottom. Identification of protective epitopes by sequencing of the major outer membrane protein gene of a variant strain of C. psittaci serotype 1 (Chlamydophila abortus) Infect. Immun. 69, (2001) 607-612.
 
D. Longbottom, E. Psarrou, M. Livingstone, E. Vretou. Diagnosis of ovine enzootic abortion using an indirect ELISA (rPOMP91B I ELISA) based on a recombinant protein fragment of the outer membrane protein POMP91B of Chlamydophila abortus FEMS Microbiol. Lett. 195, (2001) 157-161.
 
P. Tsakos, V. Siarkou, F. Guscetti, H. Chowdury, N. Papaioannou, E. Vretou, O. Papadopoulos. Experimental infection of pregnant ewes with enteric and abortion-source Chlamydophila abortus Vet. Microbiol. 82, (2001) 285-291.
 
E. Vretou, P. Giannikopoulou, E. Psarrou. Polymorphic outer membrane proteins of Chlamydophila abortus are glycosylated. Microbiology (U.K.) 147, (2001) 3303-3310.
 
D. Longbottom, S. Fairley, S. Chapman, E. Psarrou, E. Vretou, & M. Livingstone. Serological diagnosis of ovine enzootic abortion by Enzyme-Linked Immunosorbent Assay using a recombinant protein fragment of the Polymorphic Outer Membrane. Protein POMP90 of Chlamydophila abortus. J. Clin. Microbiol. 40, (2002) 4235-4243.
 
N. Borel, M.G. Doherr, E. Vretou, E. Psarrou, R. Thoma, A. Pospischil. Chlamydienabort beim Schaf: Untersuchung der Seroprävalenz in der Schweiz mittels eines kompetitiven ELISA (cELISA). Schweiz. Arch. Tierheilk. 144, (2002) 474-482.
 
E. Vretou, P. Giannikopoulou, D. Longbottom and E. Psarrou. Antigenic organization of the N-terminal part of the polymorphic outer membrane proteins 90, 91A and 91B of Chlamydophila abortus. Infect. Immun. 71, (2003) 3240-3250.
 
14. N. Borel, M.G. Doherr, E. Vretou, E. Psarrou, R. Thoma, A. Pospischil. Seroprevalences for ovine enzootic abortion in Switzerland. Prev. Vet. Med.  65, (2004) 205-216.
 
N. Borel, K. Sachse, A. Rassbach, L. Bruckner, E. Vretou, E. Psarrou, A. Pospishil. Ovine enzootic  abortion: antibody response in vaccinated sheep. Vet. Res. Comm. (2005) in press
 
Funding
   
Since the late 80’s the work in our laboratory has been supported by several grants: NATO Collaboration in research, Integral Mediterranean Programs, EU-programs and by the Greek Fellowship Foundation. The laboratory participates in the COST Action 855 “Animal Chlamydiosis and the zoonotic implications”.
(http://cost.cordis.lu/src/action_detail.cfm?action=855 )