An upper respiratory disease of commercial chickens resembling infectious coryza, but caused by a V factor‐independent bacterium

Horner, R. F.; Bishop, G. C.; Haw, Colleen

doi:10.1080/03079459208418860

Cited by 20 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…DISCUSSION Bragg and co-workers first reported a NAD-I isolate belonging to the species A. paragallinarum in South Africa in 1993 (8). Previous reports in 1992 (16,22) refused to designate NAD-I isolates as A. paragallinarum because of the NAD independence, despite the fact that clinical signs and culture characteristics corresponded to A. paragallinarum. Later, there were other reports of IC caused by NAD-I A. paragallinarum from South Africa (10,21) and Mexico (14); the NAD-independent species of Haemophilus (15,27) contributed to the acknowledgment that both NAD-D and NAD-I should be accepted as A. paragallinarum (5).…”

Section: Resultsmentioning

confidence: 86%

See 1 more Smart Citation

Naturally Occurring β-Nicotinamide Adenine Dinucleotide–IndependentAvibacterium paragallinarumIsolate in Peru

et al. 2015

View full text Add to dashboard Cite

The β-nicotinamide adenine dinucleotide (NAD) requirement has been considered to be essential for the isolation of the causal agent of infectious coryza, Avibacterium paragallinarum. Nevertheless, NAD-independent reports from South Africa and Mexico dismissed this paradigm. It is now accepted that both NAD-dependent and NAD-independent agents are able to cause infectious coryza and thus belong to the species A. paragallinarum. Here, we report for the first time in Peru a NAD-independent isolate from broiler chickens with typical signs of infectious coryza that have received a trivalent inactivated vaccine against infectious coryza. The isolate was identified based on its morphology, biochemical and serologic tests, and PCR results. Partial 16S rRNA gene sequence analysis confirmed the isolate as A. paragallinarum. There have been no cases of NAD-independent A. paragallinarum isolates reported in South America. Increasing reports around the world highlight not only the need to reconsider the in vitro nutritional requirements of this species for its correct isolation but also the cross-protection conferred by commercial infectious coryza vaccines against NAD-independent isolates.

show abstract

Section: Resultsmentioning

confidence: 86%

“…However, reports from South Africa (6,10,16,21) and Mexico (14), have demonstrated the isolation of NAD-independent (NAD-I) bacteria, supporting the idea that this requirement is not an obligatory characteristic for identifying the bacterium; consequently, both NAD-dependent (NAD-D) and NAD-I isolates are now recognized as A. paragallinarum (5).…”

mentioning

confidence: 92%

Naturally Occurring β-Nicotinamide Adenine Dinucleotide–IndependentAvibacterium paragallinarumIsolate in Peru

et al. 2015

View full text Add to dashboard Cite

show abstract

“…While this organism has traditionally been regarded as requiring nicotinamide adenine dinucleotide (V factor), but not haemin (X factor), for growth in vitro (Blackall & Matsumoto, 2003), nicotinamide adenine dinucleotide-independent forms have been recognized in both South Africa and México (Horner et al, 1992;Mouahid et al, 1992;Garcia et al, 2004). Two serotyping schemes exist*the Page scheme, which recognizes serovars A, B and C (Page, 1962); and the Kume scheme, which recognizes serogroups A, B and C with four serovars each within serogroups A and C (Blackall et al, 1990b).…”

Section: Introductionmentioning

confidence: 99%

The vaccination-challenge trial: the gold standard test to evaluate the protective efficacy of infectious coryza vaccines

et al. 2008

View full text Add to dashboard Cite

Infectious coryza is an upper respiratory tract disease of chickens with the major impact occurring in multiage flocks. We investigated the relationship between the level of antibodies, as detected by a haemagglutination-inhibition (HI) assay, in infectious coryza-vaccinated chickens and the protection against challenge in those chickens. In one experiment, chickens given a single dose of either of two infectious coryza vaccines lacked a detectable HI response to vaccination but showed significant levels of protection 11 weeks after vaccination. In contrast, in chickens given two doses of an infectious coryza vaccine and challenged 3 weeks after the second vaccine dose, there was a strong serological response with 36/40 birds having a HI titre of 1/20 or greater. In this trial there was an apparent relationship between titre and subsequent protection, with none of the 32 chickens with a titre of 1/40 or 1/80 showing any clinical signs and only one of the same group yielding the challenge organism on culture. In contrast, three of the four vaccinated chickens with a HI titre less than 1/5 developed the typical clinical signs of coryza and yielded the challenge organism on culture. Overall, our results suggest that HI titres cannot be regarded as a definitive predictor of vaccine efficacy. We suggest that the vaccination-challenge trial is the gold standard for the evaluation of the immune response to infectious coryza vaccines.

show abstract

“…Avibacterium paragallinarum (AP) is a primary pathogen and causes infectious coryza (IC) disease in chickens ( 1 – 3 ). There has been a recent increase in the incidence of this disease ( 4 – 6 ).…”

Section: Announcementmentioning

confidence: 99%

Complete genome sequences generated using hybrid Nanopore-Illumina assembly of two non-typical Avibacterium paragallinarum strains isolated from clinically normal chicken flocks

Hashish,

Chaves,

Macedo

et al. 2023

Microbiol Resour Announc

View full text Add to dashboard Cite

show abstract

An upper respiratory disease of commercial chickens resembling infectious coryza, but caused by a V factor‐independent bacterium

Cited by 20 publications

References 7 publications

Naturally Occurring β-Nicotinamide Adenine Dinucleotide–IndependentAvibacterium paragallinarumIsolate in Peru

Naturally Occurring β-Nicotinamide Adenine Dinucleotide–IndependentAvibacterium paragallinarumIsolate in Peru

The vaccination-challenge trial: the gold standard test to evaluate the protective efficacy of infectious coryza vaccines

Complete genome sequences generated using hybrid Nanopore-Illumina assembly of two non-typical Avibacterium paragallinarum strains isolated from clinically normal chicken flocks

Contact Info

Product

Resources

About