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Dr Ioannis Oikonomidis
DVM, PhD, DipACVP, DipECVCP, AFHEA, MRCVS

Publications

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2025

Hypophosphatemia in Intensive Care Unit Canine Patients: Occurrence and Association With Mortality and Duration of Hospitalization.

Oikonomidis, I. L., Rees, P., Hernando Sanz, J., & Woods, G. (2025). Hypophosphatemia in Intensive Care Unit Canine Patients: Occurrence and Association With Mortality and Duration of Hospitalization.. Veterinary clinical pathology. doi:10.1111/vcp.70013

DOI
10.1111/vcp.70013
Journal article

2024

A retrospective study of the aetiology of increased mean platelet volume in dogs presented to a small animal teaching hospital in Greece.

Oikonomidis, I. L., Antoniadis, H., Papathanasiou, A., Tsouloufi, T. K., Kousi, T., Kalafati, M. R., & Kritsepi-Konstantinou, M. (2024). A retrospective study of the aetiology of increased mean platelet volume in dogs presented to a small animal teaching hospital in Greece.. Vet Rec Open, 11(2), e70000. doi:10.1002/vro2.70000

DOI
10.1002/vro2.70000
Journal article

Hypoalbuminaemia and its association with disease and clinical outcomes in cats.

Fong, K. Y. M., Oikonomidis, I. L., Leong, D., Lo, G., Heal, J., & Woods, G. (2024). Hypoalbuminaemia and its association with disease and clinical outcomes in cats.. The Journal of small animal practice, 65(10), 721-729. doi:10.1111/jsap.13764

DOI
10.1111/jsap.13764
Journal article

What is your diagnosis? Cervical mass in a dog.

Draper, A. C. E., Oikonomidis, I., Pastorello, A., McKenzie, R., & Le Calvez, S. (2024). What is your diagnosis? Cervical mass in a dog.. Veterinary clinical pathology, 53 Suppl 2, 108-111. doi:10.1111/vcp.13306

DOI
10.1111/vcp.13306
Journal article

2023

Clinical enzymology of the dog and cat

Oikonomidis, I. L., & Milne, E. (2023). Clinical enzymology of the dog and cat. AUSTRALIAN VETERINARY JOURNAL. doi:10.1111/avj.13291

DOI
10.1111/avj.13291
Journal article

Diagnostic performance of glycated haemoglobin (HbA1c) for diabetes mellitus in dogs

Oikonomidis, I. L., Tsouloufi, T. K., Tzenetidou, Z., Ceron, J. J., Tvarijonaviciute, A., Konstantinidis, A. O., & Soubasis, N. (2023). Diagnostic performance of glycated haemoglobin (HbA1c) for diabetes mellitus in dogs. VETERINARY JOURNAL, 294. doi:10.1016/j.tvjl.2023.105958

DOI
10.1016/j.tvjl.2023.105958
Journal article

Serial measurement of cardiac troponin I in hospitalised dogs with canine parvoviral enteritis: Association with outcome and canine pancreas-specific lipase concentration

Oikonomidis, I. L., Theodorou, K., Papaioannou, E., Xenoulis, P. G., Adamama-Moraitou, K. K., Steiner, J. M., . . . Soubasis, N. (2023). Serial measurement of cardiac troponin I in hospitalised dogs with canine parvoviral enteritis: Association with outcome and canine pancreas-specific lipase concentration. RESEARCH IN VETERINARY SCIENCE, 157, 1-5. doi:10.1016/j.rvsc.2023.02.004

DOI
10.1016/j.rvsc.2023.02.004
Journal article

2022

Association of platelet indices with glycemic status in diabetic dogs

Tsouloufi, T. K., Soubasis, N., Kritsepi-Konstantinou, M., & Oikonomidis, I. L. (2022). Association of platelet indices with glycemic status in diabetic dogs. JOURNAL OF VETERINARY DIAGNOSTIC INVESTIGATION, 34(4), 742-745. doi:10.1177/10406387221101347

DOI
10.1177/10406387221101347
Journal article

Prevalence of antinuclear antibodies and rheumatoid factor titers in dogs with arthritis secondary to leishmaniosis (<i>Leishmania infantum</i>)

Tsouloufi, T. K., Theodorou, K., Day, M. J., Oikonomidis, I. L., Kasabalis, D., Mylonakis, M. E., . . . Soubasis, N. (2022). Prevalence of antinuclear antibodies and rheumatoid factor titers in dogs with arthritis secondary to leishmaniosis (<i>Leishmania infantum</i>). JOURNAL OF VETERINARY DIAGNOSTIC INVESTIGATION, 34(4), 699-702. doi:10.1177/10406387221099030

DOI
10.1177/10406387221099030
Journal article

Prevalence, association with systemic inflammatory response syndrome and outcome of stress hyperglycaemia in sick cats

Frezoulis, P. S., Oikonomidis, I. L., Saridomichelakis, M. N., Kasabalis, D., Pappa, A., Bouza-Rapti, P., . . . Soubasis, N. (2022). Prevalence, association with systemic inflammatory response syndrome and outcome of stress hyperglycaemia in sick cats. JOURNAL OF SMALL ANIMAL PRACTICE, 63(3), 197-202. doi:10.1111/jsap.13445

DOI
10.1111/jsap.13445
Journal article

The effect of age and sex on glycated hemoglobin in dogs

Oikonomidis, I. L., Tsouloufi, T. K., Kritsepi-Konstantinou, M., & Soubasis, N. (2022). The effect of age and sex on glycated hemoglobin in dogs. JOURNAL OF VETERINARY DIAGNOSTIC INVESTIGATION, 34(2), 331-333. doi:10.1177/10406387211065046

DOI
10.1177/10406387211065046
Journal article

2021

Diagnostic and prognostic value of peripheral blood leucocyte ratios in sick cats

Tsouloufi, T. K., Frezoulis, P. S., Soubasis, N., Kritsepi-Konstantinou, M., & Oikonomidis, I. L. (2021). Diagnostic and prognostic value of peripheral blood leucocyte ratios in sick cats. ACTA VETERINARIA HUNGARICA, 69(4), 308-314. doi:10.1556/004.2021.00042

DOI
10.1556/004.2021.00042
Journal article

Investigation of hypomagnesaemia prevalence and underlying aetiology in a hospitalised cohort of dogs with ionised hypocalcaemia

Woods, G. A., Oikonomidis, I. L., Gow, A. G., Tornqvist-Johnsen, C., Boye, P., Chng, Y., & Mellanby, R. J. (2021). Investigation of hypomagnesaemia prevalence and underlying aetiology in a hospitalised cohort of dogs with ionised hypocalcaemia. VETERINARY RECORD, 189(9). doi:10.1002/vetr.301

DOI
10.1002/vetr.301
Journal article

Pathology in Practice

Oikonomidis, I. L., Boye, P., Schmitz, S. S., Aresu, L., Milne, E., & Piccinelli, C. (2021). Pathology in Practice. JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION, 259(5), 485-488. Retrieved from https://www.webofscience.com/

Journal article

Serial measurement of thyroid hormones in hospitalised dogs with canine parvoviral enteritis: Incidence of non-thyroidal illness syndrome and its association with outcome and systemic inflammatory response syndrome

Oikonomidis, I. L., Theodorou, K., Papaioannou, E., Xenoulis, P. G., Adamama-Moraitou, K. K., Steiner, J. M., . . . Soubasis, N. (2021). Serial measurement of thyroid hormones in hospitalised dogs with canine parvoviral enteritis: Incidence of non-thyroidal illness syndrome and its association with outcome and systemic inflammatory response syndrome. VETERINARY JOURNAL, 274. doi:10.1016/j.tvjl.2021.105715

DOI
10.1016/j.tvjl.2021.105715
Journal article

Brainstem phaeohyphomycosis due to <i>Curvularia lunata</i> (<i>Cochliobolus lunatus</i>) in a cat

Liatis, T., Theochari, F., Kalogianni, L., Soubasis, N., Oikonomidis, I. L., Velegraki, A., . . . Polizopoulou, Z. (2021). Brainstem phaeohyphomycosis due to <i>Curvularia lunata</i> (<i>Cochliobolus lunatus</i>) in a cat. AUSTRALIAN VETERINARY JOURNAL, 99(7), 273-278. doi:10.1111/avj.13067

DOI
10.1111/avj.13067
Journal article

Differential white blood cell counts in rabbits: a comparison of the Advia 2120 and a manual method

Oikonomidis, I. L., Milne, E., & Piccinelli, C. (2021). Differential white blood cell counts in rabbits: a comparison of the Advia 2120 and a manual method. JOURNAL OF VETERINARY DIAGNOSTIC INVESTIGATION, 33(4), 670-676. doi:10.1177/10406387211007877

DOI
10.1177/10406387211007877
Journal article

A comparison study between the results of the Siemens ADVIA 120 analyzer and the manual method for differential leukocyte counts in sheep

Oikonomidis, I. L., Brozos, C., Kiossis, E., Tsouloufi, T. K., & Kritsepi-Konstantinou, M. (2021). A comparison study between the results of the Siemens ADVIA 120 analyzer and the manual method for differential leukocyte counts in sheep. VETERINARY CLINICAL PATHOLOGY, 50(2), 203-208. doi:10.1111/vcp.12935

DOI
10.1111/vcp.12935
Journal article

Case Report Eosinophilic pericardial effusion in a cat with complex systemic disease and associated peripheral eosinophilia

Checa, I. P., Woods, G. A., Oikonomidis, I. L., Paris, J., Culshaw, G. J., Pereira, Y. M., & Santarelli, G. (2021). Case Report Eosinophilic pericardial effusion in a cat with complex systemic disease and associated peripheral eosinophilia. JOURNAL OF VETERINARY CARDIOLOGY, 35, 55-62. doi:10.1016/j.jvc.2021.03.001

DOI
10.1016/j.jvc.2021.03.001
Journal article

Effect of anaemia and erythrocyte indices on canine glycated haemoglobin

Oikonomidis, I. L., Tsouloufi, T. K., Kritsepi-Konstantinou, M., & Soubasis, N. (2021). Effect of anaemia and erythrocyte indices on canine glycated haemoglobin. VETERINARY RECORD, 188(11). doi:10.1002/vetr.58

DOI
10.1002/vetr.58
Journal article

Diagnostic accuracy of cytology for canine osteosarcoma compared to histopathology

Oikonomidis, I., & Tsouloufi, T. (2021). Diagnostic accuracy of cytology for canine osteosarcoma compared to histopathology. Veterinary Evidence, 6(2). doi:10.18849/ve.v6i2.399

DOI
10.18849/ve.v6i2.399
Journal article

Trilostane monitoring in canine hyperadrenocorticism: can basal cortisol replace the ACTH stimulation test?

Tsouloufi, D., & Oikonomidis, I. (2021). Trilostane monitoring in canine hyperadrenocorticism: can basal cortisol replace the ACTH stimulation test?. Veterinary Evidence, 6(3). doi:10.18849/ve.v6i3.412

DOI
10.18849/ve.v6i3.412
Journal article

2020

Effects of surgery on free and total 25 hydroxyvitamin D concentrations in dogs

Clements, D. N., Bruce, G., Ryan, J. M., Handel, I. G., Oikonomidis, I. L., Gow, A. G., . . . Mellanby, R. J. (2020). Effects of surgery on free and total 25 hydroxyvitamin D concentrations in dogs. JOURNAL OF VETERINARY INTERNAL MEDICINE, 34(6), 2617-2621. doi:10.1111/jvim.15933

DOI
10.1111/jvim.15933
Journal article

2019

EFFECT OF SEASON ON HEMATOLOGIC, BIOCHEMICAL, AND HORMONAL ANALYTES IN RAMS OF TWO BREEDS

Oikonomidis, I. L., Kiossis, E., Brozos, C., & Kritsepi-Konstantinou, M. (2019). EFFECT OF SEASON ON HEMATOLOGIC, BIOCHEMICAL, AND HORMONAL ANALYTES IN RAMS OF TWO BREEDS. ACTA VETERINARIA-BEOGRAD, 69(4), 434-442. doi:10.2478/acve-2019-0037

DOI
10.2478/acve-2019-0037
Journal article

Capillary hemoglobin electrophoresis of healthy and anemic dogs: Quantification, validation, and reference intervals of hemoglobin fractions

Oikonomidis, I. L., Tsouloufi, T. K., Mylonakis, M. E., & Kritsepi-Konstantinou, M. (2019). Capillary hemoglobin electrophoresis of healthy and anemic dogs: Quantification, validation, and reference intervals of hemoglobin fractions. PLOS ONE, 14(9). doi:10.1371/journal.pone.0217258

DOI
10.1371/journal.pone.0217258
Journal article

Circulating and bone marrow myeloid cells containing Leishmania amastigotes in a case of advanced canine leishmaniosis

Oikonomidis, I. L., Tsouloufi, T. K., Mylonakis, M. E., Psalla, D., Soubasis, N., Rallis, T., & Kritsepi-Konstantinou, M. (2019). Circulating and bone marrow myeloid cells containing Leishmania amastigotes in a case of advanced canine leishmaniosis. JOURNAL OF VETERINARY DIAGNOSTIC INVESTIGATION, 31(5), 726-731. doi:10.1177/1040638719862599

DOI
10.1177/1040638719862599
Journal article

Hematologic, biochemical, hormonal, and redox status alterations during reproductive activity in adult rams of two breeds

Oikonomidis, I. L., Brozos, C., Kiossis, E., & Kritsepi-Konstantinou, M. (2019). Hematologic, biochemical, hormonal, and redox status alterations during reproductive activity in adult rams of two breeds. VETERINARY CLINICAL PATHOLOGY, 48(2), 347-354. doi:10.1111/vcp.12731

DOI
10.1111/vcp.12731
Journal article

Hereditary methemoglobinemia in a cyanotic cat presented for ovariohysterectomy

Vasiliadou, E., Karakitsou, V., Kazakos, G., Oikonomidis, I. L., Tsouloufi, T. K., Kosmas, P., . . . Mylonakis, M. E. (2019). Hereditary methemoglobinemia in a cyanotic cat presented for ovariohysterectomy. CANADIAN VETERINARY JOURNAL-REVUE VETERINAIRE CANADIENNE, 60(5), 502-506. Retrieved from https://www.webofscience.com/

Journal article

THE PROGNOSTIC VALUE OF MICROALBUMINURIA IN PUPPIES WITH CANINE PARVOVIRAL ENTERITIS

Oikonomidis, I. L., Soubasis, N., Ceron, J. J., Theodorou, K., Rallis, T., & Polizopoulou, Z. (2019). THE PROGNOSTIC VALUE OF MICROALBUMINURIA IN PUPPIES WITH CANINE PARVOVIRAL ENTERITIS. ACTA VETERINARIA-BEOGRAD, 69(1), 116-122. doi:10.2478/acve-2019-0008

DOI
10.2478/acve-2019-0008
Journal article

Canine and feline dirofilariosis in a highly enzootic area: first report of feline dirofilariosis in Greece

Diakou, A., Soubasis, N., Chochlios, T., Oikonomidis, I. L., Tselekis, D., Koutinas, C., . . . Rallis, T. (2019). Canine and feline dirofilariosis in a highly enzootic area: first report of feline dirofilariosis in Greece. PARASITOLOGY RESEARCH, 118(2), 677-682. doi:10.1007/s00436-018-6135-9

DOI
10.1007/s00436-018-6135-9
Journal article

2018

Whole-genome sequencing of a CTX-M-11-encoding and quinolone-non-susceptible <i>Klebsiella pneumoniae</i> ST194 isolate from a hospitalised dog in Greece

Chatzopoulou, F., Meletis, G., Polidoro, G., Oikonomidis, I. L., Dimopoulou, I., Mavrovouniotis, I., & Anagnostou, T. L. (2018). Whole-genome sequencing of a CTX-M-11-encoding and quinolone-non-susceptible <i>Klebsiella pneumoniae</i> ST194 isolate from a hospitalised dog in Greece. JOURNAL OF GLOBAL ANTIMICROBIAL RESISTANCE, 14, 126-128. doi:10.1016/j.jgar.2018.06.019

DOI
10.1016/j.jgar.2018.06.019
Journal article

Canine pancytopenia in the Mediterranean - Authors' reply

Frezoulis, P. S., Angelidou, E., Karnezi, D., Oikonomidis, I. L., Kritsepi-Konstantinou, M., Kasabalis, D., & Mylonakis, M. E. (2018). Canine pancytopenia in the Mediterranean - Authors' reply. JOURNAL OF SMALL ANIMAL PRACTICE, 59(6), 379. doi:10.1111/jsap.12849

DOI
10.1111/jsap.12849
Journal article

Validation, reference intervals and overlap performance of a new commercially available automated capillary electrophoresis assay for the determination of the major fraction of glycated haemoglobin (HbA1c) in dogs

Oikonomidis, I. L., Tsouloufi, T. K., Soubasis, N., & Kritsepi-Konstantinou, M. (2018). Validation, reference intervals and overlap performance of a new commercially available automated capillary electrophoresis assay for the determination of the major fraction of glycated haemoglobin (HbA1c) in dogs. VETERINARY JOURNAL, 234, 48-54. doi:10.1016/j.tvjl.2018.02.005

DOI
10.1016/j.tvjl.2018.02.005
Journal article

Combined and breed-specific RIs for hematologic, biochemical, and hormonal analytes in Chios and Florina adult rams

Oikonomidis, I. L., Brozos, C., Kiossis, E., & Kritsepi-Konstantinou, M. (2018). Combined and breed-specific RIs for hematologic, biochemical, and hormonal analytes in Chios and Florina adult rams. VETERINARY CLINICAL PATHOLOGY, 47(1), 56-68. doi:10.1111/vcp.12558

DOI
10.1111/vcp.12558
Journal article

Reference intervals for canine hematologic analytes using Siemens Advia 120

Oikonomidis, I. L., Tsouloufi, T. K., Papoutsi, A., & Kritsepi-Konstantinou, M. (2018). Reference intervals for canine hematologic analytes using Siemens Advia 120. JOURNAL OF THE HELLENIC VETERINARY MEDICAL SOCIETY, 69(3), 1063-1070. doi:10.12681/jhvms.18875

DOI
10.12681/jhvms.18875
Journal article

2017

Canine pancytopoenia in a Mediterranean region: a retrospective study of 119 cases (2005 to 2013)

Frezoulis, P. S., Angelidou, E., Karnezi, D., Oikonomidis, I. L., Kritsepi-Konstantinou, M., Kasabalis, D., & Mylonakis, M. E. (2017). Canine pancytopoenia in a Mediterranean region: a retrospective study of 119 cases (2005 to 2013). JOURNAL OF SMALL ANIMAL PRACTICE, 58(7), 395-402. doi:10.1111/jsap.12647

DOI
10.1111/jsap.12647
Journal article

Reference intervals for serum reactive oxygen metabolites, biological antioxidant potential, and oxidative stress index in adult rams

Oikonomidis, I. L., Kiosis, E. A., Brozos, C. N., & Kritsepi-Konstantinou, M. G. (2017). Reference intervals for serum reactive oxygen metabolites, biological antioxidant potential, and oxidative stress index in adult rams. AMERICAN JOURNAL OF VETERINARY RESEARCH, 78(3), 274-278. Retrieved from https://www.webofscience.com/

Journal article

First report of canine systemic cryptococcosis owing to <i>Cryptococcus gattii</i> in Europe

Gerontiti, S., Oikonomidis, I. L., Kalogianni, L., Soubasis, N., Kritsepi-Konstantinou, M., Velegraki, A., . . . Triantafyllou, E. (2017). First report of canine systemic cryptococcosis owing to <i>Cryptococcus gattii</i> in Europe. JOURNAL OF SMALL ANIMAL PRACTICE, 58(1), 58-59. doi:10.1111/jsap.12594

DOI
10.1111/jsap.12594
Journal article

2016

Nodular granulomatous glossitis as the sole clinical sign in canine leishmaniosis

Tangalidi, M. K., Oikonomidis, I. L., Psalla, D., Papadimitriou, S., Kritsepi-Konstantinou, M., & Mylonakis, M. E. (2016). Nodular granulomatous glossitis as the sole clinical sign in canine leishmaniosis. VETERINARY CLINICAL PATHOLOGY, 45(4), 710-714. doi:10.1111/vcp.12416

DOI
10.1111/vcp.12416
Journal article

2015

What is your diagnosis? Unusual cells in the blood smear from a dog

Oikonomidis, I. L., Mylonakis, M. E., & Kritsepi-Konstantinou, M. (2015). What is your diagnosis? Unusual cells in the blood smear from a dog. VETERINARY CLINICAL PATHOLOGY, 44(4), 605-606. doi:10.1111/vcp.12279

DOI
10.1111/vcp.12279
Journal article

A CASE OF MULTIPLE BILATERAL TESTICULAR CAPSULE MAST CELL TUMOURS IN A DOG

Oikonomidis, I. L., Tsouloufi, T. K., Brellou, G. D., Soubasis, N., Ververidis, C., Vlemmas, I., & Kritsepi-Konstantinou, M. (2015). A CASE OF MULTIPLE BILATERAL TESTICULAR CAPSULE MAST CELL TUMOURS IN A DOG. JOURNAL OF BIOLOGICAL REGULATORS AND HOMEOSTATIC AGENTS, 29(2), 417-421. Retrieved from https://www.webofscience.com/

Journal article