VPA-0045
QUESTION
Which one of the following round worms of cattle and buffaloes is transmitted during pregnancy?
OPTIONS
(A) Oesophagostomum columbianum
(B) Bunostomum phlebotomum
(C) Haemonchus contortus
(D) Toxocara vitulorium
ANSWER
(D) Toxocara vitulorium
EXPLANATION
Toxocara vitulorum is transmitted to calves mainly by prenatal and especially transmammary routes, with larvae undergoing somatic migration in the dam and becoming available to the calf through milk. Oesophagostomum, Bunostomum, and Haemonchus are not characteristically transmitted transplacentally during pregnancy.
Question Navigator
Veterinary Parasitology · 120 Questions
45
/
120
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120