The Experts below are selected from a list of 207 Experts worldwide ranked by ideXlab platform
S P Bhattacharyya - One of the best experts on this subject based on the ideXlab platform.
-
Influence of Fowl uropygial gland and its secretory lipid components on growth of skin surface bacteria of Fowl.
Indian journal of experimental biology, 1996Co-Authors: A Bandyopadhyay, S P BhattacharyyaAbstract:Bacterial species, which occur on the breast skin surface of adult (1 year old) white leghorn Fowl with intact uropygial gland, were identified as : Staphylococcus epidermidis, Sarcina lutea, Streptomyces sp. and a facultative diphtheroid belonging to the genus Corynebacterium; S. epidermidis being the most predominant one. Two species of bacteria, namely, Staphylococcus aureus and Proteus sp. were shown to colonize the skin surface after 60 days of captivity. Extirpation of uropygial gland caused severe depletion of population of S. epidermidis, Streptomyces sp. and diphtheroid. The effect was more conspicuous after 60 days compared to that after 30 days of the gland removal. On the skin surface of glandless Fowls the population of S. aureus increased significantly and a new form identified as anthracoid bacillus became the most predominant species after 60 days. Addition of total lipids from the free-flowing Fowl uropygial secretion, as 0.2% suspension, to trypticase soya broth cultures of individual bacteria of Fowl skin surface encouraged strongly the growth of S. epidermidis, Streptomyces sp. and Proteus sp. but suppressed the population of the anthracoid. When identical amount of diester wax or wax alcohol of the secretion was supplemented to the culture, more or less similar result was obtained. Wax alcohol also had a mild inhibitory effect on Streptomyces sp. Wax acids, added to the culture (0.2%) suppressed population of all the bacterial forms except Proteus sp., while the hydrocarbon fraction, which also contained some amount of squalene, produce an opposite effect.
-
influence of Fowl uropygial gland and its secretory lipid components on the growth of skin surface fungi of Fowl
Indian Journal of Experimental Biology, 1996Co-Authors: A Bandyopadhyay, S P BhattacharyyaAbstract:Bacterial species, which occur on the breast skin surface of adult (1 year old) white leghorn Fowl with intact uropygial gland, were identified as : Staphylococcus epidermidis, Sarcina lutea, Streptomyces sp. and a facultative diphtheroid belonging to the genus Corynebacterium; S. epidermidis being the most predominant one. Two species of bacteria, namely, Staphylococcus aureus and Proteus sp. were shown to colonize the skin surface after 60 days of captivity. Extirpation of uropygial gland caused severe depletion of population of S. epidermidis, Streptomyces sp. and diphtheroid. The effect was more conspicuous after 60 days compared to that after 30 days of the gland removal. On the skin surface of glandless Fowls the population of S. aureus increased significantly and a new form identified as anthracoid bacillus became the most predominant species after 60 days. Addition of total lipids from the free-flowing Fowl uropygial secretion, as 0.2% suspension, to trypticase soya broth cultures of individual bacteria of Fowl skin surface encouraged strongly the growth of S. epidermidis, Streptomyces sp. and Proteus sp. but suppressed the population of the anthracoid. When identical amount of diester wax or wax alcohol of the secretion was supplemented to the culture, more or less similar result was obtained. Wax alcohol also had a mild inhibitory effect on Streptomyces sp. Wax acids, added to the culture (0.2%) suppressed population of all the bacterial forms except Proteus sp., while the hydrocarbon fraction, which also contained some amount of squalene, produce an opposite effect.
A Bandyopadhyay - One of the best experts on this subject based on the ideXlab platform.
-
Influence of Fowl uropygial gland and its secretory lipid components on growth of skin surface bacteria of Fowl.
Indian journal of experimental biology, 1996Co-Authors: A Bandyopadhyay, S P BhattacharyyaAbstract:Bacterial species, which occur on the breast skin surface of adult (1 year old) white leghorn Fowl with intact uropygial gland, were identified as : Staphylococcus epidermidis, Sarcina lutea, Streptomyces sp. and a facultative diphtheroid belonging to the genus Corynebacterium; S. epidermidis being the most predominant one. Two species of bacteria, namely, Staphylococcus aureus and Proteus sp. were shown to colonize the skin surface after 60 days of captivity. Extirpation of uropygial gland caused severe depletion of population of S. epidermidis, Streptomyces sp. and diphtheroid. The effect was more conspicuous after 60 days compared to that after 30 days of the gland removal. On the skin surface of glandless Fowls the population of S. aureus increased significantly and a new form identified as anthracoid bacillus became the most predominant species after 60 days. Addition of total lipids from the free-flowing Fowl uropygial secretion, as 0.2% suspension, to trypticase soya broth cultures of individual bacteria of Fowl skin surface encouraged strongly the growth of S. epidermidis, Streptomyces sp. and Proteus sp. but suppressed the population of the anthracoid. When identical amount of diester wax or wax alcohol of the secretion was supplemented to the culture, more or less similar result was obtained. Wax alcohol also had a mild inhibitory effect on Streptomyces sp. Wax acids, added to the culture (0.2%) suppressed population of all the bacterial forms except Proteus sp., while the hydrocarbon fraction, which also contained some amount of squalene, produce an opposite effect.
-
influence of Fowl uropygial gland and its secretory lipid components on the growth of skin surface fungi of Fowl
Indian Journal of Experimental Biology, 1996Co-Authors: A Bandyopadhyay, S P BhattacharyyaAbstract:Bacterial species, which occur on the breast skin surface of adult (1 year old) white leghorn Fowl with intact uropygial gland, were identified as : Staphylococcus epidermidis, Sarcina lutea, Streptomyces sp. and a facultative diphtheroid belonging to the genus Corynebacterium; S. epidermidis being the most predominant one. Two species of bacteria, namely, Staphylococcus aureus and Proteus sp. were shown to colonize the skin surface after 60 days of captivity. Extirpation of uropygial gland caused severe depletion of population of S. epidermidis, Streptomyces sp. and diphtheroid. The effect was more conspicuous after 60 days compared to that after 30 days of the gland removal. On the skin surface of glandless Fowls the population of S. aureus increased significantly and a new form identified as anthracoid bacillus became the most predominant species after 60 days. Addition of total lipids from the free-flowing Fowl uropygial secretion, as 0.2% suspension, to trypticase soya broth cultures of individual bacteria of Fowl skin surface encouraged strongly the growth of S. epidermidis, Streptomyces sp. and Proteus sp. but suppressed the population of the anthracoid. When identical amount of diester wax or wax alcohol of the secretion was supplemented to the culture, more or less similar result was obtained. Wax alcohol also had a mild inhibitory effect on Streptomyces sp. Wax acids, added to the culture (0.2%) suppressed population of all the bacterial forms except Proteus sp., while the hydrocarbon fraction, which also contained some amount of squalene, produce an opposite effect.
Hee-jeong Youn - One of the best experts on this subject based on the ideXlab platform.
-
reproduction of Fowl typhoid by respiratory challenge with salmonella gallinarum
Avian Diseases, 2008Co-Authors: Hom Bahadur Basnet, Hyukjoon Kwon, Seongil Yoon, Nam Shik Shin, Yong Ho Park, Hee-jeong YounAbstract:Abstract Fowl typhoid is a disease of adult chickens and is caused by Salmonella Gallinarum infection via the alimentary tract. The experimental reproduction of Fowl typhoid per os (PO) requires artificial conditions to minimize the effect of gastric acid, and several Salmonella serovars have been known to be transmitted via the respiratory route. Therefore, we have hypothesized the existence of a respiratory route for Salmonella Gallinarum infection and have attempted to reproduce Fowl typhoid via intratracheal challenge. In accordance with our hypothesis, the intratracheal challenges of Salmonella Gallinarum reproduced exactly same lesions as Fowl typhoid and induced higher mortality and morbidity than those of the PO challenge. Therefore, this study represents the first reproduction of Fowl typhoid via respiratory route, and our findings may be useful for understanding the transmission of Salmonella Gallinarum in the field.
Takashi Yoshimura - One of the best experts on this subject based on the ideXlab platform.
-
Red jungle Fowl (Gallus gallus) as a model for studying the molecular mechanism of seasonal reproduction
Animal Science Journal, 2009Co-Authors: Nobuhiro Nakao, Keiji Kinoshita, Masayuki Iigo, Shizufumi Ebihara, Takashi Yamamura, Takao Namikawa, Makoto Mizutani, Takashi YoshimuraAbstract:Photoperiodism is an adaptation mechanism that enables animals to predict seasonal changes in the environment. Japanese quail is the best model organism for studying photoperiodism. Although the recent availability of chicken genome sequences has permitted the expansion from single gene to genome-wide transcriptional analysis in this organism, the photoperiodic response of the domestic chicken is less robust than that of the quail. Therefore, in the present study, we examined the photoperiodic response of the red jungle Fowl (Gallus gallus), a predecessor of the domestic chicken, to test whether this animal could be developed as an ideal model for studying the molecular mechanisms of seasonal reproduction. When red jungle Fowls were transferred from short-day- to long-day conditions, gonadal development and an increase in plasma LH concentration were observed. Furthermore, rapid induction of thyrotropin beta subunit, a master regulator of photoperiodism, was observed at 16 h after dawn on the first long day. In addition, the long-day condition induced the expression of type 2 deiodinase, the key output gene of photoperiodism. These results were consistent with the results obtained in quail and suggest that the red jungle Fowl could be an ideal model animal for the genome-wide transcriptional analysis of photoperiodism.
Hom Bahadur Basnet - One of the best experts on this subject based on the ideXlab platform.
-
reproduction of Fowl typhoid by respiratory challenge with salmonella gallinarum
Avian Diseases, 2008Co-Authors: Hom Bahadur Basnet, Hyukjoon Kwon, Seongil Yoon, Nam Shik Shin, Yong Ho Park, Hee-jeong YounAbstract:Abstract Fowl typhoid is a disease of adult chickens and is caused by Salmonella Gallinarum infection via the alimentary tract. The experimental reproduction of Fowl typhoid per os (PO) requires artificial conditions to minimize the effect of gastric acid, and several Salmonella serovars have been known to be transmitted via the respiratory route. Therefore, we have hypothesized the existence of a respiratory route for Salmonella Gallinarum infection and have attempted to reproduce Fowl typhoid via intratracheal challenge. In accordance with our hypothesis, the intratracheal challenges of Salmonella Gallinarum reproduced exactly same lesions as Fowl typhoid and induced higher mortality and morbidity than those of the PO challenge. Therefore, this study represents the first reproduction of Fowl typhoid via respiratory route, and our findings may be useful for understanding the transmission of Salmonella Gallinarum in the field.
