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Outbreak investigation and control case report of brucellosis: Experience from livestock research centre, Mpwapwa, Tanzania
2014
Gabriel M. Shirima | Seleman N. Masola | Obeid N. Malangu | Brant A. Schumaker
Brucellosis screening was conducted between 2005 and 2010 at the National Livestock Research Institute headquarters, Mpwapwa, Tanzania, following an abortion storm in cattle. The initial screening targeted breeding herds; 483 cattle were screened using the Rose Bengal Plate Test (RBPT) followed by the Competitive Enzyme-linked Immunosorbent Assay (c-ELISA) as a confirmatory test. The seropositivity on c-ELISA was 28.95% in 2005; it subsequently declined to 6.72%, 1.17%, 0.16% and 0.00% in 2006, 2007, 2009 and 2010, respectively. Brucella seropositivity was not detected in goats. Seropositivity declined following institution of stringent control measures that included: gradual culling of seropositive animals through slaughter; isolation and confinement of pregnant cows close to calving; proper disposal of placentas and aborted foetuses; the use of the S19 vaccine; and restricted introduction of new animals. It was thought that the source of this outbreak was likely to have been from the introduction of infected animals from another farm. Furthermore, humans were found with brucellosis antibodies. Out of 120 people screened, 12 (10%) were confirmed seropositive to brucella antigen exposure by c-ELISA analysis. The majority of the seropositive individuals (80%) were milkers and animal handlers from the farm. Nine individuals had clinical signs suggestive of brucellosis. All cases received medical attention from the district hospital. This achievement in livestock and human health showed that it is possible to control brucellosis in dairy farms, compared to pastoral and agro-pastoral farms, thus providing evidence to adopt these strategies in dairy farms thought to be at risk.
Mostrar más [+] Menos [-]Surgical Management of Recurrent Rectal Prolapse in a Domestic Kitten (Felis catus) – Case report
2014
Shongsir Warson Monsang | Jasmeet Singh | Doddhadasarahalli Nanjappa Madhu | A. Amarpal | Abhijit Motiram Pawde | Prakash Kinjavdekar
A case of recurrent rectal prolapse in a domestic 3 months old kitten was presented to the Referral Veterinary Polyclinic, Indian Veterinary Research Institute, Izatnagar, with the complaint of protruded tubular pink mass through the anus along with mild signs of mucosal necrosis since last 5 days. Reduction and retention of the prolapsed mass by conventional purse-string suture technique was attempted earlier on 2 occasions by the attending veterinarian with no good results. Hence, the case was referred for second opinion and treatment. Surgical reduction was done under ketamine-xylazine anesthesia and the animal recovered uneventfully in 7 days.
Mostrar más [+] Menos [-]Prevalence and effect of oxytetracycline on congenital fetlock knuckling in neonatal dairy calves
2014
Mujeeb R. Fazili | Hiranya K. Bhattacharyya | Manzoor u.R. Mir | Abdul Hafiz | Noore A. Tufani
Musculoskeletal system deformities were observed in 24 (34.3%) of 70 neonatal dairy calves that presented with different congenital abnormalities. Among them, 19 calves (27.1%), the majority of which were crossbred Jersey calves of either gender with mean (± s.e.) body weight 22.00 kg ± 1.17 kg and aged 7.11 ± 1.16 days, were presented for treatment of congenital knuckling. Five of the knuckling calves had additional concurrent congenital conditions and were excluded from the present study. All of the remaining 14 calves showing moderate, bilateral fetlock knuckling had a wooden or polyvinyl chloride (PVC) splint applied to the palmar or plantar aspect of the affected limbs. All of the animals received a dose of the analgesic tolfenamic acid intramuscularly, and were randomly allocated to two equal groups. Calves of Group I additionally received oxytetracycline (20 mg/kg intravenous daily for 3 days). The condition resolved satisfactorily in 83.3% and 80.0% calves from the two groups, respectively. The left and right fetlock angle (mean ± SE) reduced significantly (p ≤ 0.01) from 50.57° ± 4.20° to 4.00° ± 2.27° and 48.71° ± 2.37° to 5.33° ± 3.03°, respectively in animals of Group I. In Group II calves, the angles showed reduction from 50.86° ± 2.94° to 4.20° ± 2.75° and from 48.71° ± 3.14° to 6.80° ± 3.34°, respectively. From the present study, it was concluded that bilateral moderate fetlock knuckling in the neonatal dairy calves can be managed satisfactorily with early application of splints. Supplementary use of oxytetracycline at repeated doses of low toxicity had only a marginally beneficial effect.
Mostrar más [+] Menos [-]First molecular assessment of the African swine fever virus status of Ornithodoros ticks from Swaziland
2014
Carin I. Boshoff | Armanda D.S. Bastos | Mzwandi M. Dube | Livio Heath
African swine fever (ASF) is an economically significant haemorrhagic disease of domestic pigs. It is caused by the African swine fever virus (ASFV), a deoxyribonucleic acid (DNA)arbovirus. Argasid ticks of the genus Ornithodoros, which are widely distributed throughout southern Africa, play a primary role in virus maintenance and spread within the endemic sylvatic cycle. The ASF status of Swaziland is unknown, but this land-locked country is surrounded by ASF-positive countries, has a burgeoning pig industry and sylvatic cycle hosts present within its borders. In this first assessment of ASF status, warthog burrows in seven nature reserves and game management areas in Swaziland were investigated for tick and virus presence. Tick infestation rates of between 33.3% – 88.8% were recovered for the four Ornithodoros-infested reserves. A total of 562 ticks were screened for virus genome presence using a duplex Polymerase Chain Reaction (PCR) that targets the C-terminal end of the p72 gene of the ASFV and confirms DNA integrity through amplification of the 16S rRNA tick host gene. All samples were negative for virus genome presence and positive for the tick genome target. Nucleotide sequencing of the latter confirmed that Ornithodoros ticks from Swaziland are identical to those from the Kruger National Park in South Africa across the gene region characterised. Whilst this first evaluation of ASF presence in Swaziland indicates that the virus does not appear to be present in the key virus vector, the presence of sylvatic cycle hosts, together with the country’s proximity to ASF-affected countries calls for expanded investigations and regular monitoring of the ASF status of Swaziland.
Mostrar más [+] Menos [-]Behavioral, Performance, Carcass Traits and Hormonal Changes of Heat Stressed Broilers Feeding Black and Coriander Seeds
2014
Ramadan D.M. EL-Shoukary | Madeha H.A. Darwish | Mootaz A.M. Abdel-Rahman
The experiment was done to determine the effects of feeding heat stressed broilers (Ross308) diets contain Nigella Sativa seeds or coriander seeds on Ingestive, panting behaviors, feed consumption, weight gain, and feed conversion ratio, live body weight, slaughter weight, carcass weight and dressing percentage, corticosterone, triiodothyronine (T3) and tetraiodothyronine (T4). Three groups were used; the first one is the control group, which fed on basal diet only and the second fed diet contains 1% Nigella Sativa seeds (black seed) while the third group fed diet contain 2% coriander seeds. The previous parameters were recorded daily or weekly during the experiment or after slaughtering to collecting blood parameters. The results explained that, there was a significant increase in feeding behavior, feed consumption, weight gain and dressing percentage while there was a significant decrease in panting behavior, water to feed ratio, T3 level and corticosterone level. Moreover, there was no significance difference in drinking behavior live body weight, slaughter weight, feed conversion rate and T4 level (P<0.05). It could be concluded that, black seeds and coriander seeds can be used to alleviate the negative effect of heat stress in broiler during summer seasons in Egypt.
Mostrar más [+] Menos [-]Socioeconomic Assessment of a Tsetse and Trypanosomosis Control Program in Southwest Ethiopia
2014
Manyazewal Anberber Zeleke | Basu asoke | Yilkal Asfaw
A socioeconomic study was made to assess the outcome of a tsetse and trypanosomosis control operation conducted in Chewaka settlement station, Southwest Ethiopia, during 2005-2007 through comparisons of data before and after the control program within Chewaka, and between Chewaka and a non-controlled adjacent site, Bikiltu Didessa peasant Association. Retrospective and crossectional questionnaire survey methods were used to generate data for the study. Results showed that the total livestock and cattle population in chewaka increased by 116% and 1039 %, respectively, and the total cereal production increased by 63.2 %. During this period the overall livestock and cattle population in Bikiltu decreased by 45.7% and 47.5%, respectively, and the total cereal production declined by 35.6%. The average number of cattle bought per house hold per year in Chewaka, 1.15 head, was significantly higher (P=0.000) than the average number of 0.55 head in Bikiltu. The chances of cattle and oxen mortality in Bikiltu were 10 and 6 times (OR= 6.5 and 10.2) more likely than in Chewaka and the chance of abortion in cows in Bikiltu was more than 10 times as compared to Chewaka (OR=10.79). The control operation in chewaka settlement station resulted in rapid growth of livestock and crop production, fast expansion of farmland, improved income from animal sell and increased animal purchasing power.
Mostrar más [+] Menos [-]Efficacy of Enrofloxacin in the Treatment of Recurrent Pyoderma in Dogs
2014
B. Sudhakara Reddy | K. Nalini Kumari | V. Vaikunta Rao | V.C. Rayulu | S. Sivajothi
Dogs with a history of more than three episodes of skin infections in a period of one year were selected for a study on recurrent pyoderma. Oral enrofloxacin along with appropriate simultaneous medication for the underlying associated conditions were chosen as therapy for recurrent pyoderma in dogs. Response to therapy was excellent in all the cases. Improvement was noticed by 12 to 20 days and 20 to 26 days in recurrent superficial and deep pyoderma respectively. Relapse occurred in one dog by 45 days due to re-introduction of allergic food. Enrofloxacin proved to be an effective, safe and convenient antibiotic for the treatment of recurrent pyoderma in dogs.
Mostrar más [+] Menos [-]A Rare Case of Umbilical Hernia in a Chinchilla Rabbit (Oryctolagus cuniculus): Its Surgical Management
2014
Warson Shongsir Monsang | Mridu Pavan Baishya | Mritunjay Kumar | Joyabrata Roy | Saumen Kanti Pal
A case of umbilical hernia in a 4 months old Soviet Chinchilla rabbit was presented in the Department of Teaching Veterinary Clinical Complex, R.K.Nagar, Tripura, with a complaint of non-painful, reducible swelling observed since 5 days around the umbilical region. Appetite of animal was normal and all the clinical parameters were within the normal physiological limits. Palpation revealed presence of hernial ring and its contents which confirmed umbilical hernia. Surgical reduction was done under xylazine-ketamine anaesthesia and the animal made an uneventful recovery.
Mostrar más [+] Menos [-]Validation of an ELISA for the concurrent detection of total antibodies (IgM and IgG) to Rift Valley fever virus
2014
Charlotte E. Ellis | Vuyokazi E. Mareledwane | Roy Williams | David B. Wallace | Phelix A.O. Majiwa
Rift Valley fever virus (RVFV) infects humans and livestock, causing haemorrhaging andabortions in animals. Three major RVF epizootics have occurred in South Africa since the1950s and the outbreak in 2010 had a mortality rate of 10.7% in humans. Accurate and earlydetection is therefore essential for management of this zoonotic disease. Enzyme-linkedimmunosorbent assays (ELISAs) have been developed for the detection of either IgM or IgGantibodies to RVFV in animal sera. In this study, data are presented on the validation of adouble-antigen ELISA for the simultaneous detection of both classes of antibodies to RVFV ina single test. ELISA plates were coated with a recombinant nucleoprotein. The nucleoprotein,conjugated to horseradish peroxidase, was used as the detecting reagent. A total of 534 serafrom sheep and cattle were used in the validation. The sheep sera were collected during a RVFpathogenesis study at the Agricultural Research Council (ARC) – Onderstepoort VeterinaryInstitute and the cattle sera were collected during an outbreak of RVF in 2008 at the ARC –Animal Production Institute in Irene, Pretoria. The ELISA had a diagnostic sensitivity of 98.4%and a specificity of 100% when compared to a commercial cELISA. This convenient and fastassay is suitable for use in serological surveys or monitoring immune responses in vaccinatedanimals.
Mostrar más [+] Menos [-]In vitro Adoption and Propagation of High Pathogenic Avian Influenza (HPAI) Virus Subtype H5N1 in non-avian Host System
2014
Maheswarappa Gowrakkal | Byregowda S.M. | Pradhan H.K. | Tosh C. | Pattnaik B. | Renukaprasad C.
The paradigmatic, fatal and devastating ailment called avian influenza or bird flu is a highly contagious viral disease caused by type A influenza virus, It primarily affects the respiratory, digestive and/or nervous system of chickens, turkeys, guinea fowls and other avian species and less commonly pigs and other species of mammals including human. In India, The first pandemic outbreak of Avian Influenza was reported during 2006. In this study, we selected an isolate of high pathogenic avian influenza (A/Ck/Jalgaon/India/12419/2006) H5N1 virus and propagated in chicken embryo fibroblast. Later this virus was adopted and propagated in Madin-Darby canine kidney cells (MDCK) and Vero cells. Infected non-avian cells with an avian virus shown cytopathic effects like rounding, cytoplasmic elongation, syncytia formation and later stages fluffing from the attached surface. The harvested virus suspension shown increased haemagglutination titre (HA) than viral suspension from chicken embryo fibroblast culture and the presence of virus was confirmed by reverse transcriptase-polymerase chain reaction (RT-PCR). The obtained result reveals that virus had capacity to adopt for the invitro culture and propagate in non avian host cells with higher titre. This infers the chance of virus to cross the host barrier and probable chance of infection in human being.
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