Bacterial Flora of the Respiratory Tracts in Chickens with a Particular Reference to Lactobacillus Species

Journal of Veterinary Medical Science

Hideki HAYASHIDANI¹  Masuo OGAWA¹  Yoshimi BENNO¹  Ikuyo KAWAGUCHI¹  Ken-ichi KANEKO¹ 

关键词: chicken;    lactobacilli;    respiratory microflora;   

DOI  :  10.1292/jvms.54.261

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

References(23)Cited-By(5)The effects of three different types of breeding such as isolator, floor, and cage breedings on the bacterial flora of the respiratory tracts (nasal cavity, tongue, pharygolarynx, trachea and air sac) in chickens were determined. Total viable bacterial numbers on the nasal mucus of chickens in the isolator breeding as control group (Group A) aged of 14 days were 104.6/g of autopsy specimen (wet weight), 105.7/g of sample in the cage breeding (Group B) aged of 28days, and 107.O/g of sample in the floor breeding (Group C) aged of 28 days. Staphylococci and micrococci were predominant bacteria in the nasal cavities of all groups. Total viable numbers of tongue and pharygolarynx were from 105.4 to 106.5/g of autopsy specimen. Lactobacilli were the predominant bacteria in pharyngolarynx of chickens. The incidence of staphylococdi and micrococci in trachea was lower than those in the another regions. Staphylococci and micrococci dominated in the air sacs of two groups (B and C), but the number and incidence of lactobacilli in the air sacs of chickens were lower than those in the another respiratory tracts. The only clostridia isolation in the air sacs of Group A was observed. A total of 75 strains of Lactobacillus species was isoalted from all respiratory organs and intestine of chickens. These strains were divided into 19 groups. Lactobacillus salivearius subsp. salivarius was the predominant lactobacilli isolated from tongue and pharyngolarynx. Most of isolates from the chicken intestines were mainly identified as the L.acidophilus group and L.reutbri. These findings show that lactobacilli were Predominantly isolated from nasal cavity, tongue, and pharyngolarynx of chickens, but not from trachea and air sac and the difference at the species level of Lactobacillus is present.

【 授权许可】

Unknown