Publications by authors named "Okewole P"

Marek's disease (MD) and chicken infectious anaemia (CIA) are viral immunosuppressive diseases of poultry caused by the MD virus (MDV) and CIA virus (CIAV) respectively. Despite vaccination against MD, the incidence of the disease in vaccinated poultry flocks in Nigeria persists. However, underlying factors like co-infection with CIAV have not been investigated in the country.

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Graded concentrations (200, 400 and 800 mg/kg) of the aqueous stem bark extract of Khaya senegalensis was evaluated for its therapeutic efficacy against experimentally induced coccidiosis in broiler chicken. The phytochemical analysis shows the presence of tannins, saponins, cardiac glycosides and steroids. There was significant reduction in oocyst count across the groups in a graded dose manner with 800 mg/kg being the most efficacious dose.

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Article Synopsis
  • - The study focused on an outbreak of Peste-des-petits-ruminants (PPR) and Goat pox (GTP) in a mixed flock of sheep and goats in Kanam, Nigeria, highlighting the difficulty in controlling these economically important diseases.
  • - Researchers collected blood and tissue samples from the infected animals and used laboratory techniques to detect antibodies and the presence of the viruses responsible for PPR and GTP, confirming co-infection in the same flock.
  • - Phylogenetic analysis showed that the PPR virus belongs to lineage IV, with similarities to viruses from Gabon and Cameroon, while the GTP virus clustered with sequences from Burkina Faso and Yemen, indicating a regional connection.
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Background: Rabies is endemic in Nigeria with clinical cases reported mainly in dogs and occasionally in livestock from all the geo-ecological zones of the country. Detection of rabies virus antigen in puppies at the age of five to ten weeks and in apparently healthy dogs shedding the virus in their saliva have been reported in some parts of Nigeria.

Material And Method: This report describes a clinical rabies in a set of eight weeks old puppies confirmed by antigen detection using the direct fluorescent antibody test (DFAT), the direct rapid immunohistochemical test (DRIT), and RT-PCR.

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Article Synopsis
  • Genetic analysis of fourteen Nigerian avian influenza isolates revealed a cleavage site characteristic of highly pathogenic avian influenza (HPAI), with specific amino acid substitutions noted in one isolate.
  • Phylogenetic analysis identified two main clusters of HPAI H5N1, with Cluster I closely related to viruses from neighboring West African countries and Cluster II closely associated with viruses from Europe and other West African nations.
  • The findings highlight the ongoing HPAI outbreaks in Nigerian poultry and emphasize the need for continual monitoring and characterization of HPAI isolates due to their zoonotic risk.
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Background: Rabies causes 55, 000 annual human deaths globally and about 10,000 people are exposed annually in Nigeria. Diagnosis of animal rabies in most African countries has been by direct microscopic examination. In Nigeria, the Seller's stain test (SST) was employed until 2009.

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Coccidiosis is a disease of economic importance in poultry causing morbidity and mortality. Reports show that Azadirachta indica and Khaya senegalensis have been used individually in the treatment of avian coccidiosis. We thus investigated the efficacy and safety of the combined aqueous extracts of these plants for the treatment of experimentally induced coccidiosis in broiler chickens using oocyst count, oxidative stress biomarkers, serum biochemistry, histology, and haematological parameters.

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Background: There have been previous reports of inapparent infection and intermittent secretion of rabies virus in the saliva of apparently healthy dogs in some African countries, including Nigeria.

Objective: The study was therefore aimed at examining the carrier status of rabies in apparently healthy Nigerian dogs in the settlement areas studied.

Methods: Ninety-two swabs samples from oral mucosae of domestic dogs (mongrels) without vaccination history were assayed for lyssaviruses by tissue culture isolation test in Vero cells.

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Introduction: Highly pathogenic avian influenza H5N1 was first reported in poultry in Nigeria in February 2006. The only human case that occurred was linked to contact with poultry in a live bird market (LBM). LBM surveillance was instituted to assess the degree of threat of human exposure to H5N1.

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Clinical signs of severe bronchopneumonia, including anorexia, coughing, nasal discharge, dyspnoea, diarrhoea, distension of the neck, lethargy, recumbency, lameness preceding collapse, and death were observed among a herd of Holstein-Friesian dairy cattle. The outbreak occurred over a 30-day period, and attack and case-fatality rates were 0.4% and 50%, respectively.

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Four mycoplasma-like organisms isolated from ewes with mucopurulent vaginal discharge and swollen vulva were characterised. Biochemical tests showed three of the isolates to be negative for glucose fermentation and arginine hydrolysis, while the remaining isolate was negative for glucose fermentation but hydrolysed arginine. Serological identification using the growth inhibition, growth precipitation and indirect immunofluorescence tests indicated the three similar isolates as Mycoplasma bovigenitalium and the other isolate as Mycoplasma arginini.

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Enterotoxaemia caused by Clostridium perfringens type A in five intensively managed pigs is reported. The condition was precipitated by constipative digestive disturbance. Diarrhoea was not observed in the five animals before death.

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An outbreak of Streptococcus pyogenes infection occurred in a colony of 800 Dunkin-Hartley guinea pigs resulting in 364 (46%) deaths involving breeders, sucklings, weaners, but mainly adults used as a source of blood meals for haematophagus flies (Glossina palpalis). Clinical signs included bleeding from the nose, mouth and vagina before death. Necropsy revealed pneumonia with consolidation of one or both lungs, haemopericardium and haemothorax.

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During an epidemic of intestinal coccidiosis, 1128 young domestic rabbits died out of 2385 animals examined. Nine species of Coccidia were identified with a minimum of five different species per rabbit. Clinical and necropsy findings as well as treatment and control measures are described, epidemiology and pathogeny are discussed.

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Of 334 mature breeding guineapigs, 53 (15.9%) died in a disease outbreak involving Salmonella typhimurium serotypes 1, 4, 5 and 12 : i : 1,2. The uterus was consistently involved.

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A 10-month-old Alsation dog with history of anorexia, diarrhoea, dehydration and vomition developed a double intussusception which affected the distal jejunum and proximal ileum. Necropsy revealed the intussusception to be swollen and congested with fibrinous adhesions between the intussusceptum and intussuscepiens. Two pieces of bone believed to be the inciting cause were found within the intussusceptum.

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