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Table 2 Clinical, serological, pathological, and bacteriological parameters in treated animals

From: Evaluation of new generation macrolides for the treatment and metaphylaxis of contagious bovine pleuropneumonia (CBPP) in cattle experimentally infected with Mycoplasma mycoides subspecies mycoides

Study Site

Kenya (VSRI)

Zambia (CVRI)

Treatment

Saline

Tulathromycin

Gamithromycin

Oxytetracycline

Saline

Tulathromycin

Gamithromycin

Oxytetracycline

Number of Cattle

15 (14*)

15

15

15

13

13

13

14

Max. number of pyrexia days

2

1

1

0

6

1

1

1

Number euthanased

6

0

1

1

3

0

0

0

Max. CFT titer

640 b

320

320

80

2560

20

640

640

Number with acute/subacute or chronic lesions

14

3

4

1

12

0

0

3

Number (%) with Mycoplasma isolated from tissue, pleural fluid or BAL

5/14 (36%)

0

2/15 (13%)

1/15 (7%)

10/13 (77%)

1/13 (8%)

2/13 (15%)

6/14 (43%)

Number (%) with Mycoplasma isolated from nasal swabs

3/15 (20%)

1/15 (7%)

4/15 (27%)

3/15 (20%)

2/13 (15%)

0

2/13 (15%)

2/14 (14%)

Average HT lesion score (s.d.) a

3.40 (2.03)

0.33 (0.72)

0.67 (1.18)

0.40 (1.55)

2.54 (1.90)

0

0

0.57 (1.22)

p-value for significance (lesion scores)

Groups (overall): p ≤ 0.001; s.e. 0.375

Groups (overall): p = 0.003; s.e. 0.438 (n = 13); 0.423 (n = 14)

Comparison

Group 1 vs.

Group 2 p ≤ 0.001

Group 3 p ≤ 0.001

Group 4 p ≤ 0.001

Group 1 vs.

Group 2# (p ≤ 0.001)

Group 3# (p ≤ 0.001)

Group 4 p ≤ 0.003

  1. *Tissue samples for one animal were missing, hence n = 14 for lesion score. #Appropriate analysis only possible for data for Groups 1 and 4, as 2 and 3 were all negative. However, Groups 2 and 3 are considered to be significantly lower than Group 1 because the 95% CI for Group 1 > zero (approx. 1.5–3.5)
  2. a Lesion score calculated for the size and type of acute or chronic lung lesions. b At VSRI, samples indicating end-point titers beyond 1/640 were not titrated further, in which case the CFT titer was reported as 640