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Author Silva, Cc Da ♦ Pereira, Vla ♦ Barreto, Ml ♦ Nascimento, Er Do ♦ Santos, Fc Dos ♦ Brandão, Mdm ♦ Machado, Ls ♦ Soares, Mv
Source Directory of Open Access Journals (DOAJ)
Content type Text
Publisher Fundação APINCO de Ciência e Tecnologia Avícolas
File Format HTM / HTML
Date Created 2015-12-15
Copyright Year ©2014
Language English
Subject Domain (in LCC) SF1-1100 ♦ SF600-1100 ♦ QL1-991
Subject Keyword Agriculture ♦ Eggs ♦ Economic loss ♦ Egg abnormality ♦ Mycoplasm ♦ Science ♦ Animal culture ♦ Veterinary medicine ♦ Egg defects ♦ Zoology
Abstract A farm with 3,000 free-range hens between 24 and 65 weeks of age was investigated. These hens were separated in small flocks of 400 to 700 birds, presenting 10 to 23% egg production reduction. Twenty serum samples were collected during the period of drop in egg production and three weeks later for the investigation of Mycoplasma synoviae (MS), M. gallisepticum (MG) and Infectious Bronchitis Virus (IBV) antibodies using ELISA. At the time of the second collection, egg production had resumed to normal levels; however, with 10.23% of the eggs showed eggshell abnormalities limited to the apex. Eggshell strength was significantly different between normal and those with eggshell apex abnormalities, but not other egg-quality parameters. ELISA tests showed that MS and IBV titers increased during the evaluated period. MS infection was confirmed by culture and by PCR of tracheal swabs. All samples were negative for MG by ELISA and PCR. Further studies with larger samples to ensure the occurrence of this disease in industrial layer flocks in Brazil are under way.
ISSN 1516635X
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Date 2014-06-01
e-ISSN 1516635X
Journal Brazilian Journal of Poultry Science
Volume Number 16
Issue Number 2
Page Count 3
Starting Page 101
Ending Page 103


Source: Directory of Open Access Journals (DOAJ)