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This paper deals with normal values of some serum biochemical parameters in chickens and laying hens with regard to their age and sex. Investigations were performed on clinically healthy multipurpose birds of the Astra S race, both females and males aged 1-23 and 1-18 weeks, respectively. In serum of blood collected from the animals, levels of total protein, glucose, total cholesterol, triglycerides,...
The aim of the studies was the use of Haemophilus somnus vaccine in the immunization of chickens to protect them against Salmonella infections by increasing the local cross-immunity of the alimentary tract. Broilers were immunized with a live vaccine administered in drinking water on the 1st and the 14,h day of life. The groups were as follows: H. somnus (24h broth culture, 109 cfu/ml); Salmonella...
Glioblastoma is the most common brain malignancy and is marked by an extremely poor prognosis, despite advances in surgical and clinical neuro-oncology. That is why central nervous system glioblastoma is quite a challenging neoplasm, requiring much further research to understand the molecular and cellular clinical basis. Existing in vivo glioblastoma models are based on the inoculation of glioma cells...
The probiotic potential of a Lactobacillus salivarius 3d strain isolated from chicken faeces was assessed in one day old chickens. Lactobacillus salivarius 3d was administered per os at a concentration of 10⁸ cfu in 100 μl of PBS. The chickens were then challenged with pathogenic bacteria: Salmonella Enteritidis, Campylobacter jejuni and Clostridium perfringens. Samples of caecal contents and livers...
Enrofloxacin is a synthetic chemotherapeutic agent from the class of the fluoroquinolones that is widely used to treat bacterial infections in animals. Fluoroquinolones cause severe lesions in articular-epiphyseal cartilage complexes of growing mammals. The aim of the present study was to determine whether enrofloxacin has chondrotoxic, dose- and time-dependent effects on avian articular cartilage...
Three phytase preparations were added to broiler rations with considerably reduced levels of phosphorus. Birds were allocated to a positive control group (I), a negative control group (II) and three phytase-supplemented groups (III – Aspergillus niger phytase, IV – Penicillium canescens phytase, V – Pichia phytase). Major components of starter and grower diets were wheat, corn and soybean meals. Starter...
Quinolone-induced arthropathy has been observed after a single very large dose, or after several moderately large doses in juvenile animals of multiple species. The purpose of the present study was to determine whether long-term treatment with therapeutic doses of enrofloxacin has a detrimental effect on chicken articular cartilage. 21-day-old broiler chickens were treated orally with 10 mg/kg/day...
In order to determine the effect of different production systems on muscle ultrastructure in meat-type chickens, we examined m. gastrocnemius and m. pectoralis superficialis in two lines of chickens (Anak Titan and Isa 215) raised in three different technological systems (indoors in a conventional facility, indoors with limited outdoor access and outdoors with an umbrella roof). Our previous study...
This review article presents fundamental mechanisms of the local mucosal immunity in selected regions of the respiratory tract in healthy birds and in some pathological conditions. The respiratory system, whose mucosa come into direct contact with microorganisms contaminating inhaled air, has some associated structures, such as Harderian gland (HG), conjunctive-associated lymphoid tissue (CALT) and...
The transgenic chicken has great potential as a bioreactor for the production of valuable pharmaceutical proteins, notably in the oviduct/egg. Whereas conventional transgenic approaches have significant limitations in this species, an alternative approach employing primordial germ cells (PGCs), the progenitor cells to ova and spermatozoa, has now been successfully applied to the insertion of exogenous...
The present study was designed to investigate the influence of Se deficiency on serum histamine concentration and the expression of histamine receptor in the jejunum of chickens. Forty neonatal chickens were randomly divided into two groups. Experimental chickens were fed a low-Se diet (0.034 mg/kg), whereas chickens in the control group were fed a diet with a Se level of 0.229 mg/kg. Ten chickens...
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