Abstract
Salmonellosis and colibacillosis are continuing serious problems facing poultry industry in Egypt. In this study, 300 different pooled broiler chickens organs samples as (trachea, lung, liver, heart, spleen, unabsorbed yolk sac and intestine) were collected from different apparently healthy and sick broiler flocks in different localities of Luxor governorate during (2015 and 2016). The examined broiler flocks were suffering from various health problems developed during the final two weeks of the growing period, resulting in increased mortality and condemnation losses. Bacterial isolation was done by using standard method of isolation and identification. The results showed that 92 out of 300 broiler organs samples were positive for Salmonella spp. (30.66%) while 161 out of 300 were E.coli positive (53.66%). The present study showed that the main Salmonella spp. isolates were (S. Typhimurium (24%), the both of S. Enteritidis, S. Anatum were (21.7%) and S. Kentucky (19.56%), S. Bargny and S. Molade (3.26%) then S. Newport, S. Ingada and S. Agona their percentage were (2.17%) respectively, while 8 serotypes of E.coli were obtained with the following serological identification O78 (44%), O1:H7 (17.39%), O91:H21 (15.52%), O128:H2 (13%) and other E.coli serotypes were identified as (O2:H6, O26:H11, O55:H7, O146:H21) their percentage was (1:3%). Bacterial strains were tested against 21 antibacterial agents using the standard disk diffusion method on Muller and Hinton’s Agar medium. The results were recorded that most of Salmonella spp were highly resistant to (Oxytetracycline, Doxycycline, Tetracycline then Enrofloxacin, Sulphamethoxazole) and were sensitive to (Gentamycin, colistinsulphate and Ceftiofur). While most of E.coli isolates were resistant to Neomycin and Streptomycin and were sensitive to Ceftiofur then Colistinsulphate.
Highlights
Avian pathogenic Escherichia coli (APEC) is the major cause of Colibacillosis in poultry (SolàGinés et al, 2012)
A variable number of sick broilers showed and post mortem examination was performed on infected and freshly dead birds which succumbed to the diseases after onset of mortalities on the examined farm, gross lesions were recorded from birds with Colibacillosis and Salmonellosis as
The current study showed high prevalence of Colibacillosis and Salmonellosis infections in (Ross, Cup, Hubbard and Sasso) broiler chickens during (2015-2016) at Luxor governorate, E.coli isolates were the predominant (53.66%) followed by Salmonella species (30.66%) these diseases are considered to be the major bacterial diseases in the poultry industry world-wide and have public health perspective
Summary
Avian pathogenic Escherichia coli (APEC) is the major cause of Colibacillosis in poultry (SolàGinés et al, 2012) It is a common world wide disease in poultry flocks especially in the intensive farming system (Chansiripornchai., 2009) and Gamal et al, (2017) examined 200 broiler chickens and found 73 (36.5%) were infected with E.coli, strains (O78, O2, and O1) are the most prevalent serotypes detected. It affects birds of all ages, spread into various internal organs and cause Colibacillosis characterized by systemic fatal disease (De Carli et al, 2015).
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