Fig. 1.

Parasitic infection of 287 organic beef cattle examined copro-microscopically using the McMaster flotation method: levels by herd, animal age and month of the grazing season
n | Index | Eimeria sp. | Strongylida | Nematodirus sp. | Strongyloides sp. | Trichuris sp. | Aonchotheca sp. | Moniezia benedeni | ||
---|---|---|---|---|---|---|---|---|---|---|
In total | 287 | P | 28.9 | 46.0 | 5.2 | 2.1 | 1.4 | 1.0 | 4.2 | |
CIP | 23.8–34.5 | 40.2–51.5 | 3.1–8.5 | 0.9–4.5 | 0.5–3.6 | 0.3–3.1 | 2.4–7.3 | |||
Ic/In | 287 | 113 | 177 | 53 | 35 | 20 | ++ | |||
CII | 113–793 | 88–147 | 62–324 | 23–93 | 20–50 | NC | (+)–(+++) | |||
Herd | A | 100 | P | 39.0a | 44.0 | 6.0ab | 3.0 | 1.0 | 0.0 | 5.0 |
CIP | 29.9–49.0 | 34.4–54.0 | 2.6–12.4 | 0.8–8.4 | 0.1–5.3 | 0.0–3.8 | 2.0–11.3 | |||
Ic/In | 297 | 56b | 23b | 60 | 80 | NE | +++ | |||
CII | 104–974 | 42–76 | 20–27 | 20–100 | NC | NC | (+)–(+++) | |||
B | 47 | P | 23.4ab | 51.1 | 0.0b | 0.0 | 2.1 | 2.1 | 2.1 | |
CIP | 13.2–37.5 | 37.0–65.0 | 0.0–8.0 | 0.0–8.0 | 0.1–11.3 | 0.1–11.3 | 0.1–11.3 | |||
Ic/In | 42 | 48b | NE | NE | 20 | 20 | + | |||
CII | 29–53 | 33–91 | NC | NC | NC | NC | NC | |||
C | 69 | P | 30.4ab | 44.9 | 11.6a | 4.3 | 1.4 | 1.4 | 5.8 | |
CIP | 20.3–42.7 | 33.2–57.3 | 5.4–21.6 | 1.2–12.1 | 0.1–7.7 | 0.1–7.7 | 2.0–14.3 | |||
Ic/In | 524 | 192a | 313a | 47 | 20 | 20 | + | |||
CII | 59–2,790 | 125–306 | 118–498 | 20–67 | NC | NC | (+)–(++) | |||
D | 71 | P | 16.9b | 46.5 | 1.4b | 0.0 | 1.4 | 1.4 | 2.8 | |
CIP | 9.7–27.4 | 35.1–58.5 | 0.1–7.5 | 0.0–5.3 | 0.1–7.5 | 0.1–7.5 | 0.5–9.7 | |||
Ic/In | 60 | 162a | 20 | NE | 20 | 20 | + | |||
CII | 25–118 | 106–241 | NC | NC | NC | NC | NC | |||
Age | Calves (<0.5 year) | 6 | P | 83.3e | 33.3 | 0.0 | 33.3a | 0.0 | 0.0 | 0.0ab |
CIP | 41.1–99.2 | 6.3–72.9 | 0.0–41.1 | 6.3–72.9 | 0.0–41.1 | 0.0–41.1 | 0.0–41.1 | |||
Ic/In | 1268 | 320 | NE | 110 | NE | NE | NE | |||
CII | 28–3,700 | 40–320 | NC | 80–110 | NC | NC | NC | |||
Yearlings (0.5–1 year) | 13 | P | 69.2e | 69.2 | 7.7 | 15.4a | 0.0 | 7.7 | 23.1a | |
CIP | 41.3–88.7 | 41.3–88.7 | 0.4–34.2 | 2.8–43.4 | 0.0–22.5 | 0.4–34.2 | 6.6–52.0 | |||
Ic/In | 71 | 113 | 20 | 20 | NE | 20 | + | |||
CII | 36–164 | 56–184 | NC | NC | NC | NC | + | |||
Heifers (1–2 years) | 40 | P | 52.5e | 35.0 | 2.5 | 0.0b | 0.0 | 0.0 | 0.0b | |
CIP | 37.2–67.7 | 21.2–51.3 | 0.1–13.3 | 0.0–8.4 | 0.0–8.4 | 0.0–8.4 | 0.0–8.4 | |||
Ic/In | 182 | 53 | 20 | NE | NE | NE | NE | |||
CII | 32–486 | 33–100 | NC | NC | NC | NC | NC | |||
Cows (>2 years) | 228 | P | 21.1f | 46.9 | 5.7 | 0.9b | 1.8 | 0.9 | 3.9b | |
CIP | 16.2–26.9 | 40.3–53.5 | 3.2–9.6 | 0.2–3.2 | 0.6–4.5 | 0.2–3.2 | 2.0–7.4 | |||
Ic/In | 270 | 117 | 202 | 30 | 35 | 20 | ++ | |||
CII | 63–1,270 | 88–159 | 77–368 | 20–30 | 20–50 | NC | (+)–(+++) | |||
Month | May | 51 | P | 27.5 | 70.6a | 0.0 | 3.9 | 0.0 | 3.9 | 0.0 |
CIP | 16.4–41.1 | 56.9–81.6 | 0.0–7.3 | 0.7–13.4 | 0.0–7.3 | 0.7–13.4 | 0.0–7.3 | |||
Ic/In | 51 | 96a | NE | 50 | NE | 20 | NE | |||
CII | 29–126 | 72–137 | NC | 20–50 | NC | NC | NC | |||
June | 38 | P | 28.9 | 44.7b | 5.3 | 5.3 | 2.6 | 2.6 | 2.6 | |
CIP | 16.7–45.3 | 29.6–60.6 | 0.9–18.0 | 0.9–18.0 | 0.1–14.0 | 0.1–14.0 | 0.1–14.0 | |||
Ic/In | 38 | 76ab | 20 | 20 | 20 | 20 | + | |||
CII | 27–56 | 46–156 | NC | NC | NC | NC | NC | |||
July | 39 | P | 23.1 | 38.5b | 2.6 | 2.6 | 0.0 | 0.0 | 5.1 | |
CIP | 12.3–38.4 | 24.1–55.2 | 0.1–13.6 | 0.1–13.6 | 0.0–8.6 | 0.0–8.6 | 0.9–17.5 | |||
Ic/In | 722 | 68b | 100 | 140 | NE | NE | + | |||
CII | 36–2,890 | 31–159 | NC | NC | NC | NC | + | |||
August | 48 | P | 31.2 | 33.3b | 8.3 | 0.0 | 0.0 | 0.0 | 4.2 | |
CIP | 19.6–45.8 | 21.1–47.9 | 2.9–19.6 | 0.0–7.8 | 0.0–7.8 | 0.0–7.8 | 0.7–14.3 | |||
Ic/In | 260 | 43b | 20 | NE | NE | NE | ++ | |||
CII | 52–677 | 25–77 | NC | NC | NC | NC | ++ | |||
September | 57 | P | 29.8 | 45.6b | 8.8 | 1.8 | 1.8 | 0.0 | 5.3 | |
CIP | 19.1–42.9 | 33.2–58.8 | 3.5–19.1 | 0.1–9.3 | 0.1–9.3 | 0.0–6.6 | 1.4–14.6 | |||
Ic/In | 72 | 202a | 472 | 40 | 20 | NE | + | |||
CII | 42–121 | 111–324 | 128–616 | NC | NC | NC | (+)–(++) | |||
October | 54 | P | 31.5 | 40.7b | 5.6 | 0.0 | 3.7 | 0.0 | 7.4 | |
CIP | 20.2–45.3 | 28.4–54.7 | 1.5–15.5 | 0.0–6.9 | 0.7–12.7 | 0.0–6.9 | 2.6–17.4 | |||
Ic/In | 648 | 145a | 27 | NE | 50 | NE | +++ | |||
CII | 74–3,480 | 76–235 | 20–33 | NC | 20–80 | NC | (+)–(+++) |
Genera and species as proportions of all Strongylida (%) in infected organic beef cattle, based on a total of 600 L3 infective larvae (150 L3 larvae from each herd) identified by larvoscopic examination
Genus or species of Nematoda | Herd | Total | |||
---|---|---|---|---|---|
A | B | C | D | ||
Ostertagia sp. | 10.0 | 28.0 | 6.0 | 50.0 | 23.5 |
Haemonchus placei | 65.3 | 58.0 | 68.6 | 13.3 | 51.3 |
Bunostomum sp. | ND | ND | 4.7 | ND | 1.2 |
Trichostrongylus axei | 2.7 | 3.3 | 16.6 | 24.7 | 11.8 |
Cooperia sp. | ND | 8.7 | 2.7 | 4.7 | 4.0 |
Oesophagostomum sp. | 20.7 | 2.0 | 0.7 | 7.3 | 7.7 |
Chabertia ovina | ND | ND | 0.7 | ND | 0.2 |
Nematodirus fillicolis | 1.3 | ND | ND | ND | 0.3 |
Proportion of particular Eimeria species (%) infecting organic beef cattle, based on a total of n = 600 oocysts (150 oocysts from each herd) identified after sporulation
Species of Eimeria | Herd | Total | |||
---|---|---|---|---|---|
A | B | C | D | ||
E. bovis | 21.3 | 52.0 | 8.0 | 67.3 | 37.1 |
E. zuernii | 38.7 | 16.7 | 65.3 | 12.0 | 33.1 |
E. alabamensis | 0.7 | ND | ND | 3.3 | 1.0 |
E. auburnensis | 6.7 | ND | 2.7 | 3.3 | 3.2 |
E. ellipsoidalis | 10.0 | 16.0 | 12.0 | 8.0 | 11.5 |
E. bukidnonensis | 3.3 | ND | 3.3 | ND | 1.7 |
E. pellita | 2.0 | 12.0 | 2.0 | 0.7 | 4.2 |
E. subspherica | 3.3 | ND | 2.7 | 1.3 | 1.8 |
E. cylindrica | 0.7 | 3.3 | ND | 2.0 | 1.5 |
E. canadensis | 5.3 | ND | ND | 1.3 | 1.7 |
E. wyomingensis | 8.0 | ND | 4.0 | ND | 3.0 |
E. brasiliensis | ND | ND | ND | 0.7 | 0.2 |