Evaluation system for an experimental study of low-pathogenic avian influenza virus (H9N2) infection in specific pathogen free chickens using lactic acid bacteria,Lactobacillus plantarumKFCC11389P

2008 ◽  
Vol 37 (6) ◽  
pp. 593-597 ◽  
Author(s):  
Heeson Chon ◽  
Byungryul Choi ◽  
Gajin Jeong ◽  
Inpil Mo
Keyword(s):  
Experimental Study ◽  
Influenza Virus ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Avian Influenza ◽  
Evaluation System ◽  
Specific Pathogen Free ◽  
Pathogenic Avian Influenza ◽  
Specific Pathogen ◽  
Pathogenic Avian Influenza Virus

Interference between low pathogenic avian influenza H9N2 and avirulent Newcastle diseases viruses in embryonated Specific Pathogen-Free chicken eggs

2021 ◽  
Vol 1 (2) ◽  
pp. 7-10
Author(s):  
Amal Essalah-Bennani ◽  
Asma Fagrach ◽  
Abderrazak El Khantour ◽  
Ouafaa Fassi Fihri ◽  
Moncef Bouzouaia ◽  
...  
Keyword(s):  
Avian Influenza ◽  
Virus Replication ◽  
Model Assessment ◽  
Specific Pathogen Free ◽  
Pathogenic Avian Influenza ◽  
Specific Pathogen ◽  
Pathogenic Avian Influenza Virus ◽  
Low Pathogenic Avian Influenza

Co-infection with low pathogenic avian influenza virus (LPAIV) H9N2 and Newcastle disease virus (NDV) has become a worrying concern for the poultry industry. The problem arises when the hidden virus influences the replication of another suspected virus. Subsequently, misdiagnosis of the actual cause may be ended up as a source of contamination for the other healthy flocks by the spread of the covered-up virus. In this preliminary study, we determined the potential impact of concurrent infection with H9N2 and avirulent NDV (Lasota) on the virus replication in Specific Pathogen-Free embryonated chicken egg (SPF-ECE) model. Assessment of the potential interference phenomena was carried out based on embryonic lesions, mortalities, and virus replication using real-time PCR. Our results showed that H9N2 interferes with LaSota growth, regardless of which infection occurred first. Our obtained preliminary results are a call for scientists to study the interference between LPAIV H9N2 and NDV both in-vivo and in-vitro in more detail.

Extended transmission of two H5/H7 low pathogenic avian influenza viruses in chickens

2014 ◽  
Vol 143 (4) ◽  
pp. 781-790 ◽  
Author(s):  
G. CLAES ◽  
B. LAMBRECHT ◽  
J. DEWULF ◽  
T. van den BERG ◽  
S. MARCHÉ
Keyword(s):  
Influenza Virus ◽  
Avian Influenza ◽  
Avian Influenza Virus ◽  
Exposure Period ◽  
Influenza Viruses ◽  
Specific Pathogen Free ◽  
Avian Influenza Viruses ◽  
Short Term ◽  
Pathogenic Avian Influenza ◽  
Specific Pathogen

SUMMARYTransmission experiments are useful for investigating the mechanisms of low pathogenic notifiable avian influenza virus (LPNAI) transmission. In this study, the hypothesis that inoculation-infected chickens are more infectious than contact-infected chickens was tested. To this end, extended transmission experiments with one H5N2 and one H7N1 LPAIV which had previously been characterized in a series of standard transmission experiments were conducted in specific pathogen-free (SPF) chickens. For the H5N2 LPAIV, the infectivity of contact-infected chickens was similar to the infectivity of inoculated chickens. Despite results from a previous study suggesting the H7N1 LPAIV strain to be similarly infectious to SPF chickens as the H5N2 LPAIV strain, the acquisition of contact-infected chickens proved more difficult for H7N1 LPAIV. It was assumed that this might have been a consequence of the length and timing of the exposure period. In conclusion, for LPNAIVs that first seemed equally infectious, short-term transmissibility may vary considerably.

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