John O. Okoye

University of Nigeria

Publishing since 1983, latest 2025

Epidemiology
Animal Science and Zoology
Agronomy and Crop Science
Ecology, Evolution, Behavior and Systematics
Infectious Diseases
Genetics

Publications: 701983–2025
Citations: 584to those papers
h-index: 14i10-index 24
Field-weighted impact: 0.481.00 is the world average
World top 10%: 1%1 of 70 scored papers
Open access: 73%51 papers free to read

1 other work — a preprint, a dataset or the like — is listed but not counted.

By year

Papers, and the citations to them

Publications, left axisCitations to that year’s papers, right axis2026 still in progress

Career

On their papers

Every institution they have given on a paper.

Publications

70 in all

The lesions of the velogenic newcastle disease virus infection in the lymphoid organs suppress antibody response to infectious bronchitis vaccination in La Sota vaccinated and unvaccinated chickens
2025Revue d’élevage et de médecine vétérinaire des pays tropicauxJournalOpen accessSenior author0 citations10.19182/remvt.37594
Effects of multiple La Sota vaccinations on the atrophy of the lymphoid organs associated with velogenic Newcastle disease virus infection in pullets

Download CV:PDFWord

Citations received each year

Peerford

To all their work, old papers included. Google Scholar also counts citations from theses, books and web pages, so its line runs higher.

What they work on

From the classification of each paper

Subfields

Epidemiology4361%
Animal Science and Zoology3550%
Agronomy and Crop Science2434%
Ecology, Evolution, Behavior and Systematics1217%
Infectious Diseases1116%
Genetics57%
Microbiology57%
Plant Science57%
Food Science46%
Parasitology46%

Health Sciences
Life Sciences

Topics most written on

Virology and Viral Diseases38
Animal Disease Management and Epidemiology23
Animal Virus Infections Studies23
Livestock and Poultry Management14
Vector-Borne Animal Diseases12
Microbial infections and disease research5
Viral Infections and Vectors4
Animal Nutrition and Physiology3
Coccidia and coccidiosis research3
Escherichia coli research studies3
Influenza Virus Research Studies3
Mycotoxins in Agriculture and Food3

Who they write with

Their most frequent co-authors, and the papers those co-authors share

Where their co-authors are

10% of their papers have a co-author abroad

papers co-written1122223Home

Most frequent partner countries

United States3
Malaysia2
Poland1
Germany1

Papers with at least one author in that country.

Institutions written with most

National Veterinary Research InstituteNG17 papers
Michael Okpara University of AgricultureNG13 papers
Joseph Sarwuan Tarka University MakurdiNG6 papers
University of MaiduguriNG4 papers
Ahmadu Bello UniversityNG3 papers
University of FloridaUS2 papers
Universiti Sains MalaysiaMY2 papers
University of Florida HealthUS2 papers
Federal University of Technology OwerriNG2 papers
Usmanu Danfodiyo UniversityNG2 papers

Where they publish

Avian Pathology14
Tropical Animal Health and Production7
Comparative Clinical Pathology5
Journal of Applied Animal Research5
Acta Veterinaria Brno3
Open Journal of Veterinary Medicine3

Development goals addressed

From each paper’s title and abstract

3Good health and well-being36
2Zero hunger14
6Clean water and sanitation3
14Life below water3

Most cited

LaSota vaccination may not protect against the lesions of velogenic newcastle disease in chickens
Tropical Animal Health and Production2
200845 citations
Serologic evidence of avian influenza virus infections among Nigerian agricultural workers
Journal of Medical Virology2
201336 citationsWorld top 10%Open access · Bronze
Atrophy of the lymphoid organs and suppression of antibody response caused by velogenic Newcastle disease virus infection in chickens

2025Acta Veterinaria HungaricaJournalSenior author0 citations10.1556/004.2025.01143

Prevalence of Escherichia coli in retail poultry feeds in Southeastern Nigeria

2023Journal of Animal Science and Veterinary MedicineJournalOpen accessSenior author1 citation10.31248/jasvm2023.363

Pathology of Komarov vaccine in Hitchner B1 vaccinated and unvaccinated broilers

2021Tropical Animal Health and ProductionJournalSenior author1 citation10.1007/s11250-021-02986-8

IMMUNE PROFILING OF GRAIN ADAPTED I-2 (GAI-2) PELLETED FEED VACCINE IN 6 WEEKS OLD COCKERELS IN VOM NIGERIA

2017Journal of Experimental Biology and Agricultural SciencesJournalOpen access1 citation10.18006/2017.5(5).599.605

Vitamin A dietary supplementation reduces the mortality of velogenic Newcastle disease significantly in cockerels

2015International Journal of Experimental PathologyJournalOpen accessSenior author15 citations10.1111/iep.12138

Serologic evidence of avian influenza virus infections among Nigerian agricultural workers

2013Journal of Medical VirologyJournalOpen accessFirst author36 citations10.1002/jmv.23520

Caractérisation pathologique chez des poulets du virus vélogénique de la maladie Newcastle isolé chez une pintade

2000Revue d’élevage et de médecine vétérinaire des pays tropicauxJournalOpen accessFirst author23 citations10.19182/remvt.9709

Revue d’élevage et de médecine vétérinaire des pays tropicaux

Archives of Veterinary Science2

How it can be read

73% free to read

Diamond 20 · 29%Free to read and to publish
Gold 10 · 14%In an open-access journal
Hybrid 4 · 6%Open in a subscription journal
Bronze 15 · 21%Free to read, no open licence
Green 2 · 3%A copy in a repository
Closed 19 · 27%Behind a paywall

Who funds it

8 of 70 papers name a funder

Państwowy Instytut Weterynaryjny - Państwowy Instytut Badawczy3
Ontario Veterinary College, University of Guelph2
U.S. Department of Agriculture2
Iowa State University1
University of Guelph1
World Health Organization1

Tropical Animal Health and Production3

Pathogenesis of infectious bursal disease in embryonally bursectomised chickens

Avian Pathology3

199026 citationsOpen access · Bronze