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Antigens (and recombinants) and immune response to avian influenza [Virus diseases].
1975
Easterday B.C.
Production, purification, and characterization of avian mycoplasmas.
1975
Yoder H.W. Jr.
Antibody response to avian mycoplasmas [Mycoplasma gallisepticum, Mycoplasma meleagridis, Mycoplasma synoviae, chickens, turkeys].
1975
Kleven S.H.
Infectious bursal disease virus: antigen production and immunity [Chickens].
1975
Lukert P.D. | Leonard J. | Davis R.B.
Progress in the control of Marek's disease [Herpesvirus, turkeys, chickens].
1975
Purchase H.G.
Tetragomphius melis n.sp. (Nematoda: Ancylostomidae) from the Japanese badger, Meles meles anakuma Temminck.
1974
Ohbayashi M. | Suzuki Y. | Araki J.
Characterization of multiplication of embryo-adapted avian encephalomyelitis virus in chick embryo brain cell cultures.
1974
Kamada M. | Sato G. | Miura S.
Acacia angustissima intoxication of Menz lambs requires two components Texte intégral
2005
Brown, D.L. | Yimegnuhal, A. | McCrabb, G.J.
This study sought to determine if sheep suffer neurological symptoms when fed Acacia angustissima leaves, and whether an equivalent amount of 70% acetone extract would have the same effect. In addition, the study tried to determine if treatment of leaves with 70% acetone would destroy the activity of A. angustissima toxins, and whether extraction with 70% aqueous acetone extract would separate two components of a toxic system. Twenty-five Menz lambs were randomly assigned to one of five treatments (1) A angustissima leaves as half the diet, 2) dried extract (70% aqueous acetone) of the same quantity of leaves, 3) a corresponding amount of residues, 4) a recombination of the dried extract and dried residue, or (5) a control diet containing no A angustissima leaves or extract fractions. All animals fed the leaves and the recombined fractions died or were euthanized when they were observed to be dying of severe neurological derangement. None of the other animals showed any neurological signs of impairement. The results of this study indicate that healthy, well-fed sheep can be poisoned by A angustissima, that the toxins are not destroyed by acetone or oven drying, and that severe neurological intoxication requires two components, which can be separated by acetone extraction.
Afficher plus [+] Moins [-]Factors affecting hematological profiles in three Ethiopian indigenous goat breeds Texte intégral
2004
Tibbo, Markos | Jibril, Y. | Woldemeskel, M. | Dawo, F. | Aragaw, K. | Rege, J.E.O.
Hematological parameters were studied in 163 apparently healthy goats comprised of 3 indigenous breeds at Adami-Tulu Agricultural Research Centre (ATARC) and Sheno, Agricultural Research Centre (SARC), Ethiopia. Data were analyzed for the effect of breed, sex, age, and season. Hemoglobin (Hb) was significantly higher (P < 0.0001) for Arsi-Bale (AB) than Longeared Somali (LES) and Central Highland (CH) goats. Packed cell volume (PCV) was significantly lower (P < 0.0001) for LES than the other two breeds. White blood cells (WBC) (P < 0.05), neutrophils (P < 0.0001) and basophils (P < 0.0001) were higher in CH than in the other two breeds. Conversely, lymphocytes were lowest (P < 0.0001) in CH goats compared to other breeds. Female goats had significantly (at least P < 0.05) higher red blood cells (RBC), PCV, WBC, lymphocytes and eosinophils than male goats. In contrast, males had higher (P < 0.05) mean corpuscular hemoglobin (MCH) and neutrophils than females. There was no significant age difference for the erythrocytic series but the age difference was highly significant (P < 0.0001) for the leukocytic series. WBC and lymphocytes decreased as age increased while the reverse was true for neutrophils and eosinophils. Seasonal variation was also considerable for both erythrocytic and leukocytic series. RBC, Hb, lymphocytes, and neutrophils of the indigenous goat breeds were remarkably different compared to most other exotic goat breeds.
Afficher plus [+] Moins [-]Avian mycobacteriosis in domestic chickens from selected agro-climatic regions in Ethiopia Texte intégral
2003
Tadesse, S. | Woldemeskel, M. | Molla, B. | Tibbo, Markos | Kidane, D. | Medhin, G. | Britton, S.
Domestic poultry are important natural hosts of Mycobacterium avium (MAC), especially in the traditional poultry management system in the tropics. Qualitative and quantitative studies on a total of 95 chickens from three agro-climatic areas in Ethiopia were examined for avian mycobacteriosis through postmortem examinations and tissue staining (haematoxylin & eosin and acid-fast staining). The mycobacteria species were isolated and identified by using mycobacteriologic culture and experimental infection for virulence assessment. Five of the 95 examined chickens (5.3%) had gross tuberculous lesions in different visceral organs. On histopathologic examination, the lesions showed granuloma with typical Langhan’s giant cells in which acid-fast bacilli were shown by acid-fast stain. The culture on pyruvate-enriched Lowenstein-Jensen slants revealed growth of colonies on samples from 6 (6.3%) of the 95 chickens. Experimental infection with the strains from culture resulted in death of 10 (83.3%) of 12 inoculated chickens 56 to 110 days after inoculation, indicating that the isolates may be virulent strains of MAC. On postmortem examination, the experimentally infected chickens showed similar tuberculous lesions to natural infection that was confined at the site of injection, on the liver, spleen and (in two subjects) small intestine. The inoculated organisms were recovered from the respective organs. Therefore, this study showed that a virulent strain of MAC infects domestic chicken in Ethiopia.
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