153 research outputs found

    Vaccines against infectious coryza

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    The paper reviews the literature on vaccines against infectious coryza of chickens. Our knowledge of natural immunity, antigens involved in protection and the degree of cross-serovar protection provided by vaccines is summarized. The effect of variables such as antigen dose, inactivating agent and adjuvant type on vaccine efficacy is reviewed. The protective ability of a new generation infectious coryza vaccine based on a live attenuated strain of Haemophilus paragallinarum is discusse

    Comparison of isolation methods of Erysipelothrix rhusiopathiae from arthritic pig joints

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    A practical routine isolation technique is established for Erysipelothrix rhusiopathiae from arthritic pig joints. A direct culture is made onto selective erysipelothrix agar and non-selective blood agar plates. The joint fluid and synovial membrane is stored in an enrichment broth at 4°C for 4 weeks and then cultured onto erysipelothrix agar and blood agar plates

    Genetic and antigenic studies on Haemophilus parasuis

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    Haemophilus parasuis, an organism dependent upon nicotinamide adenine dinucleotide (NAD) or V-factor for in-vitro growth, is the causative agent of porcine polyserositis and arthritis (Glasser's disease) (Nicolet, 1992). The principal lesions associated with this disease are fibrinous or serofibrinous meningitis, serositis, pleuritis, pericarditis, peritonitis and arthritis that can occur in various combinations or occasionally singly (Nicolet, 1992)
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