in order to show the type and severity of gross and histopathologic lesions induce by vaccinal strain (serotype a1) of pateurella mulocida, ten four-week-old spf chickens were inoculated intramuscularly with 75 cfu of ( 0.5 ml of 10-7 dilution) bacterium. all birds died in less than 16 hours. no prominent gross lesions were observed in different organs. in microscopic examination, the most comm...

In this study, we determined and genetically characterized three fowl adenoviruses isolated from chickens with inclusion body hepatitis (IBH) and hydropericardium syndrome (HPS) in China and assessed their pathogenicity. The full genome of HBQ12, BJH13 and JSJ13 was found to be 44,081, 43,966 and 43,756 nucleotides long, respectively. Sequence alignment and phylogenetic analysis revealed that s...

This experiment was to investigate the age-related changes in hormonal concentration and biochemical constituents of blood plasma in Indian native desi fowl. One hundred and sixty two (54 from each breed, i.e., Kadaknath (KN), Aseel peela (AP), and White leghorn (WLH)) day-old female chicks were randomly divided into nine groups each of 18 chicks (3 groups × 3 replicates). WLH was taken in this...

The ability of birds to perform effective jumps may play an important role in predator avoidance and flight initiation. Jumping can provide the vertical acceleration necessary for a rapid takeoff, which may be particularly important for ground-dwelling birds such as phasianids. We hypothesized that by making use of elastic energy storage and release, the leg muscles could provide the large powe...

The avian embryo develops within an eggshell which limits the rate of gaseous exhange between the bloodstream and the environment. In the latter half of normal incubation a considerable respiratory disturbance develops so that in the blood of the embryonic fowl the PCOi rises from 20 to 60 mmHg within about 8 days (Dawes & Simkiss, 1969; Freeman & Misson, 1970). A variation of this magnitude in...

HARRIS et al.1), observing ultrastructural changes in rapidly frozen fowl spermatozoa, noted destructive effects on the acrosome, the midpiece, and the cytoplasmic membrane. Similar ultrastructural damages were seen by BAKST and SEXTON2) in frozen-thawed fowl and turkey spermatozoa under transmission and scanning electron microscopes. However, they gave little information on the possible mechan...

The present work aimed at studying growth pattern and carcass traits in pearl grey guinea fowl fed on dietary Neem (Azadirachta indica) leaf powder (NLP) over a period of 12 weeks. Day old guinea fowl keets (n=120) were randomly assigned to four treatment groups, each with 3 replicates. The first treatment was designated as control (T0) in which no supplement was added to the feed, while in tre...

R. A. FISHER (1930) developed a phylogenetic and statistical theory of dominance of wild type over mutants involving a selection of modifiers that shift the phenotype of the heterozygous mutant toward the wild type. The wild type has a selective advantage which also is conferred upon heterozygotes. FISHER (1 934,1935,1938) noted that many common mutations in the domestic fowl were dominant in c...

Pupil responses triggered by specific stimulus attributes such as spatial structure, colour and light flux changes were measured in eight domestic fowl. Comparative experiments were also carried out in human subjects. The results were unexpected in that large increments in light flux caused only small constrictions of the pupil. A red stimulus, on the other hand, caused a relatively large pupil...

Silky fowl, a breed of chicken, is hyperpigmented in its various internal tissues. The pigment was extracted from various tissues of two strains of Silky fowl to determine its molecular structure and internal distribution. Analysis by infrared spectroscopy showed two spectrum patterns of the pigment in Silky fowl; one is from ovary and testis, the other is from periosteum and feather. The diffe...