PMID- 20390548
OWN - NLM
STAT- MEDLINE
DCOM- 20100706
LR  - 20100414
IS  - 1465-3338 (Electronic)
IS  - 0307-9457 (Linking)
VI  - 39
IP  - 2
DP  - 2010 Apr
TI  - Induction of eggshell apex abnormalities in broiler breeder hens.
PG  - 133-7
LID - 10.1080/03079451003657637 [doi]
AB  - Recently, the causal relationship between eggshell apex abnormalities (EAA) and 
      Mycoplasma synoviae was described. This eggshell pathology has only been 
      documented in table egg layers both spontaneously and experimentally infected 
      with M. synoviae, suggesting that meat-type layers are less prone to this 
      condition. In this study the susceptibility of specified pathogen free (SPF) 
      broiler breeder hens to produce eggs with EAA after M. synoviae infection was 
      assessed. Five groups of 12 hens each were made: a negative control group, a 
      group inoculated intratracheally (i.t.) with a M. synoviae EAA strain at 19 weeks 
      of age, a group inoculated i.t. with this strain at 19 and 26 weeks of age, a 
      group inoculated with M. synoviae i.t. at 19 weeks of age and infected 5 days 
      earlier with infectious bronchitis virus D1466 (IBV), and a fifth group similar 
      to the former but inoculated i.t. twice with an M. synoviae EAA strain at 19 and 
      26 weeks of age. Eggs with EAA were only produced after a single i.t. inoculation 
      with the M. synoviae EAA strain if preceded by an infection with IBV. The 
      production of eggs with EAA started 6 weeks after M. synoviae EAA inoculation and 
      the proportion of eggs with EAA during the experiment was 9/449 (2%), which was 
      much lower than that in SPF layer hens (14-22%). The present results suggest that 
      broiler breeder hens are less susceptible to producing eggs with EAA after an 
      infection with a M. synoviae EAA strain preceded by an IBV infection, compared 
      with table egg layers. Similar to SPF egg layers, the mean daily egg production 
      per hen was significantly reduced by the M. synoviae EAA strain and there was a 
      general negative effect on eggshell strength by this strain, suggesting it could 
      also have a detrimental effect on hatching egg quality.
FAU - Feberwee, A
AU  - Feberwee A
AD  - Animal Health Service, GD, Deventer, EZ, the Netherlands. 
      a.feberwee@gddeventer.com
FAU - Landman, W J M
AU  - Landman WJ
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Avian Pathol
JT  - Avian pathology : journal of the W.V.P.A
JID - 8210638
SB  - IM
MH  - Animals
MH  - Chickens
MH  - Coronavirus Infections/microbiology/pathology
MH  - *Egg Shell/abnormalities/microbiology
MH  - Eggs
MH  - Female
MH  - Infectious bronchitis virus/physiology
MH  - Mycoplasma Infections/*microbiology/pathology
MH  - Mycoplasma synoviae/*physiology
MH  - Ovum/*microbiology/pathology
MH  - Poultry Diseases/*microbiology/pathology
EDAT- 2010/04/15 06:00
MHDA- 2010/07/07 06:00
CRDT- 2010/04/15 06:00
PHST- 2010/04/15 06:00 [entrez]
PHST- 2010/04/15 06:00 [pubmed]
PHST- 2010/07/07 06:00 [medline]
AID - 921016281 [pii]
AID - 10.1080/03079451003657637 [doi]
PST - ppublish
SO  - Avian Pathol. 2010 Apr;39(2):133-7. doi: 10.1080/03079451003657637.