Research Results - (PDF, 101 mb) - USAID

Pasteurellamultocida (5=50%); P.hemo/ytica The low number of dead crias was
(2=20%) and E.coli (3=30%). C. perfringens,type probably related to the fact that the dams were
A, was isolated from three intestinal samples. adults. However, the average birth weight was
For immunological studies, the sodium sulfite lower than those reported in organized enterprecipitation
test of serum proteins was used. prises of same area. It was interesting to find P.
From eleven dead crias (four in group A and haemolytica (20%), besides P.multocida, which
seven in B), 75% in group A (supervised for was isolated last year. However, more characsuckling)
presented complete failure for trans- terization of these bacteria is needed to deterference
passive immunity and 42.8% in group B mine their role in disease in newborn alpacas.
(Tables 2 and 3). Samples for histopathological The immunological findings reveal that comstudies
are being evaluated. plete failure in transfer of passive immunity was
Table 2. Results of the sodium sulfite precipitation test for serum immunoglobulin
levels in eleven dead crias
Groups
Dead crias A B Total
Igtransfer No % N' % No %
Complete failure 3 75.0 3 42.8 6 54.5
Normal 1 25.0 4 57. 5 45.5
Total 4 100.0 7 99.9 11 100.0
Table 3. Correlation of some parameters and cause of death with serum
immunoglobulin level by the precipitation test in eleven alpaca crias.
Protocol Age Body weight Cause of Precip. Results
No (days) (Kg) death Test
1 3 6.2 Starvation + C.F.
2 2 2.5 Born weak C.F.
3* 2 3.5 Born weak +++ Normal
4* 11 11.0 Starvation - C.F.
5* 3 3.0 Born weak - C.F.
6 1 4.5 Umbil.hemor. - C.F.
7* 7 7.5 Starvation - C.F.
8 7 6.5 Starvation +++ Normal
9 1 3.5 Born weak +++ Normal
10 3 4.0 Pneumonia ... Normal
11 20 8.0 starvation +++ Normal
* Crias of group A, the remainder were in group B.
C.F: complete failure in transfer of passive immunity.
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