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Antibody response to 1.0 and 0.5 mL doses of an inactivated bacterial vaccine against bovine respiratory disease in young Holstein calves: a field trial

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20 set 2023
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Fig. 1.

Antibody responses in young Holstein calves vaccinated with a dose of 1.0 mL or 0.5 mL of an inactivated bacterial vaccine against bovine respiratory disease PV-Control - primary-vaccination control; NV-Control - no-vaccination control; arrows – vaccination times; **, * – significant increase compared to titre at one week of age (P < 0.01, P < 0.05); †† – significant decrease compared to titre at one week of age (P < 0.01); A-B, X-Y, a-b, x-y, α-β, χ-ψ – differences in final antibody titres (P < 0.01, P < 0.01, P < 0.05, P < 0.05, P < 0.10, and P < 0.10, respectively)
Antibody responses in young Holstein calves vaccinated with a dose of 1.0 mL or 0.5 mL of an inactivated bacterial vaccine against bovine respiratory disease PV-Control - primary-vaccination control; NV-Control - no-vaccination control; arrows – vaccination times; **, * – significant increase compared to titre at one week of age (P < 0.01, P < 0.05); †† – significant decrease compared to titre at one week of age (P < 0.01); A-B, X-Y, a-b, x-y, α-β, χ-ψ – differences in final antibody titres (P < 0.01, P < 0.01, P < 0.05, P < 0.05, P < 0.10, and P < 0.10, respectively)

Fig. 2.

Standardised regression coefficients from the logistic regression for seropositivity Primary – primary vaccination; Booster – booster vaccination; * – P < 0.05
Standardised regression coefficients from the logistic regression for seropositivity Primary – primary vaccination; Booster – booster vaccination; * – P < 0.05

Body mass index (BMI) values for the experimental and control groups of young Holstein calves and null hypothesis validity of the values

Group BMI P-value
1.0 + 1.0 0.5 + 1.0 0.5 + 0.5 PV-Control NV-Control
1.0 + 1.0 64.9 ± 0.8 1 0.898 1.000 0.731 0.715
0.5 + 1.0 64.0 ± 0.9 0.898 1 0.975 0.568 0.534
0.5 + 0.5 64.6 ± 0.8 1.000 0.975 1 0.731 0.584
PV-Control 66.8 ± 1.5 0.731 0.568 0.731 1 0.999
NV-Control 66.8 ± 1.7 0.715 0.534 0.584 0.999 1

The number of calves with high and low maternal antibody levels and with positive and negative vaccine responses to (a) H_ somni, (b) P_ multocida and (c) M_ haemolytica

(a) One week of age Seven weeks of age
H. somni High MAL Low MAL P-value Positive Negative P-value
1.0 + 1.0 0 14 11 3 0.005**
0.5 + 1.0 0 14 12 2 0.000**
0.5 + 0.5 0 14 5 9 0.556
PV-Control 0 12 1 11 0.008**
NV-Control 0 12 0 12 0.000**
P-value 1.000 0.000**
(b) One week of age Seven weeks of age
P. multocida High MAL Low MAL P-value Positive Negative P-value
1.0 + 1.0 9 5 14 0 0.015*
0.5 + 1.0 4 10 14 0 0.015*
0.5 + 0.5 6 8 13 1 0.159
PV-Control 7 5 5 7 0.006**
NV-Control 6 6 4 8 0.000**
P-value 0.402 0.000**
(c) One week of age Seven weeks of age
M. haemolytica High MAL Low MAL P-value Positive Negative P-value
1.0 + 1.0 9 5 2 12
0.5 + 1.0 6 8 3 11
0.5 + 0.5 12 2 2 12
PV-Control 5 7 0 12
NV-Control 6 6 0 12
P-value 0.104 0.275

Dosages of the vaccine and sample size

Group Dose at one week of age Dose at four weeks of age Sample size
1.0 + 1.0 1.0 mL 1.0 mL n = 14
0.5 + 1.0 0.5 mL 1.0 mL n = 14
0.5 + 0.5 0.5 mL 0.5 mL n = 14
PV-Control Not vaccinated 1.0 mL n = 12
NV-Control Not vaccinated Not vaccinated n = 12
Lingua:
Inglese
Frequenza di pubblicazione:
4 volte all'anno
Argomenti della rivista:
Scienze biologiche, Biologia molecolare, Microbiologia e virologia, Scienze della vita, altro, Medicina, Medicina veterinaria