APSS 2013 Proceedings - The University of Sydney
APSS 2013 Proceedings - The University of Sydney
APSS 2013 Proceedings - The University of Sydney
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Aust. Poult. Sci. Symp. <strong>2013</strong>.....24<br />
In 2010, a new episode <strong>of</strong> IBH inclusion body hepatitis was observed in<br />
certain regions <strong>of</strong> the province <strong>of</strong> Quebec through provincial diagnostic laboratories.<br />
<strong>The</strong>se cases were observed from different hatcheries and did not show the previous<br />
sequence <strong>of</strong> 5 to 6 weeks <strong>of</strong> broiler chicks with problems and were <strong>of</strong> both serotype 8<br />
and 11. During the outbreaks, blood samples were analysed from birds showing<br />
clinical signs and birds without clinical signs. Metabolic acidosis was a consistent<br />
finding in affected birds. Hypocalcemia and hypoglycemia were also highly prevalent.<br />
<strong>The</strong> following cases were evaluated and supportive treatments were instigated for the<br />
observed biochemical changes based on variation from normal values compiled in our<br />
database. A follow-up biochemical test was evaluated and zootechnical results were<br />
recorded. Considering recent publications on the difficulty <strong>of</strong> reproducing inclusion<br />
body hepatitis with adenovirus by itself we believe that factors favoring metabolic<br />
acidosis, hypoglycemia or hypocalcemia can play a role in the severity <strong>of</strong> inclusion<br />
body hepatitis<br />
Tables 1 and 2 show, respectively, the results <strong>of</strong> blood parameters and feed<br />
analysis.<br />
Parameter<br />
Table 1 - Blood parameters during 2010 IBH outbreaks<br />
Database (7 to<br />
35 days)<br />
Birds from<br />
affected farms<br />
with clinical<br />
signs<br />
Birds from<br />
affected farms<br />
without<br />
clinical signs<br />
Birds from<br />
affected farms<br />
after treatment<br />
N 166 47 29 16<br />
Avg age (days)<br />
±SD<br />
19.68±8.6 20.17±5.15 19.58±6.53 21.50±7.35<br />
Ht (%)±SD 21.43±3.45 18.93±3.90 20.48±1.97 18.63±3.42<br />
vpH±SD 7.375±0.09 7.366±0.10 7.387±0.07 7.355±0.12<br />
vPCO 2<br />
(mmHg)±SD<br />
-<br />
vHCO 3<br />
(mmol/L)±SD<br />
vBeecf<br />
(mmol/L)±SD<br />
Na + (mmol/L)<br />
±SD<br />
K + (mmol/L)<br />
±SD<br />
Ca ++ (mmol/L)<br />
±SD<br />
Glu (mmol/L)<br />
±SD<br />
46.43±9.59 34.44±14.73 43.49±8.87 40.43±11.01<br />
26.998±4.12 19.219±6.17 25.917±6.82 22.843±6.82<br />
1.800±4.99 -6.135±6.48 0.931±4.78 -2.714±8.21<br />
144.29±5.36 144.17±3.93 144.90±7.16 143.38±3.81<br />
5.53±0.76 5.43±0.90 5.33±0.59 5.58±0.92<br />
1.381±0.118 1.075±0.271 1.433±0.083 1.274±0.253<br />
14.101±2.09 8.136±6.34 14.213±2.00 10.194±5.45<br />
227
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