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  • Title: [Clinical cases of infectious coryza and the properties of isolated Haemophilus strains].
    Author: Giurov B.
    Journal: Vet Med Nauki; 1984; 21(7-8):22-30. PubMed ID: 6506456.
    Abstract:
    Studied were a total of sixteen cases with the clinical picture of coryza. Leading role in eleven of them had Haemophilus, in one the signs of chronical cholera and pox were seen, and in three there was a Pseudomonas aeruginosa infection. All cases were serologically positive for CRD. By their needs of nutrient growth factors the isolated Haemophilus strains belonged to H. paragallinarum, and they proved pathogenic for 8-week-old birds and poults that were about to lay their first eggs, killing 4-7-day-old chick embryos up to the 48 h hour. Tests for resistance to therapeutic means with the use of the disk-diffusion method revealed sensitivity to streptomycin, tetracycline, chloramphenicol, gentamycin, erythromycin, spectinomycin, furazolidon, imekil, cosumix, trimetoprim, and sulfadoxin. Good and very good therapeutic and prophylactic effects were produced with the use of sulfotin, cosumix, linkospectin, and trimedin coupled with aerosol disinfection with rivanol, the birds being present on the premise. It is stated that with regard to differential diagnosis coryza caused by Haemophilus paragallinarum should not be confused with fowl cholera, pox, CRD, and Pseudomonas aeruginosa infection which may run their course in a mixed infection.
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