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Cattle Parasites.

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Presentation on theme: "Cattle Parasites."— Presentation transcript:

1 Cattle Parasites

2 Intestinal Nematodes Loss of appetite Immuno-suppression
Destruction of gastric glands and interference with protein digestion Loss of tissue fluid

3 Strongyles Over 30 different genera and/or species of intestinal nematodes which have eggs that look similar. “Strongyles or strongyle-type eggs” In general, treated the same Digestive tract May compete for nutrients, cause tissue damage, or suck blood (anemia)

4 Strongyles

5 Trichostrongyles Ostertagia ostertagi
Recognized as the most important nematode parasite of cattle raised in temperate climates Can developmentally arrest Large economic impact on cattle industry – treatment and prevention costs

6 Ostertagia ostertagi Brown stomach worm 6-10 mm
Larvae destroy gastric glands Severe diarrhea & weight loss Fecal flotation Tx: Albendazole, Fenbendazole, Ivermectin, Moxidextin






12 Cooperia spp. Cattle bankrupt worm 4-8 mm D+ Anorexia Depressed growth
Synergistic with Ostertagia ostertagia Fecal flotation Tx: Albendazole, Fenbendazole, Ivermectin, Moxidectin


14 Bunostomum spp. Hookworm 10-28 mm Anemia D+ Weight loss
Fecal flotation Tx: Albendazole, Fenbendazole, Ivermectin, Moxidectin


16 Trichuris ovis Whipworm 2-3 mm Rarely pathogenic Fecal flotation
Tx: Fenbendazole, Ivermectin



19 Capillaria sp. Capillary worm 5-8 mm Mostly nonpathogenic
Fecal flotation Tx: None tested

20 Dictyocaulus viviparus
Lungworm 3-8 cm Cough Dyspnea Lethargy Baermann technique, fecal flotation Tx: Albendazole, Fenbendazole, Ivermectin, Moxidectin


22 Fasciola hepatica Common liver fluke 3-4 cm Hepatic trauma Hepatitis
Death Fecal sedimentation Tx: Albendazole, Clorsulon, Nitroxynil, Raoxanide



25 Moniezia benedeni Tapeworm Up to 100 cm Mostly nonpathogenic
Proglottids on stool, fecal flotation Tx: Albendazole, Dichlorophen, Fenbendazole, Niclosamide



28 Tritrichomonas foetus
Protozoan 10-25 um Early abortion storms Pyometra Preputial washings & culture Tx: Ipronidazole, Metronidazole



31 Babesia bigemina Babesia, Texas Cattle Fever 2-3 um x 4-5 um Anemia
Splenomegaly Blood smear Tx: Antibiotics, Dip for ticks


33 Eimeria spp. Coccidia 16-47 um x 13-32 um Bloody diarrhea Death
Decreased production D+ Fecal flotation Tx: Amprolium, Sulfamethazine


35 Cryptosporidium spp. Crypto 6 um x 6 um Zoonotic D+ Fecal flotation
Tx: Supportive care

36 Cochliomyia hominivorax
Screwworm Up to 15 mm REPORTABLE Maggots penetrate tissue Identify larvae Tx: Ivermectin, Organophosphates

37 Cochliomyia hominivorax
Female can lay up to 500 eggs per day Eggs hatch ~ 12 hours Larvae feed and produce dark, foul-smelling liquid which attract more flies – can quickly become infested with thousands of larvae Larvae feed for 5-7 days before dropping to ground as pupae Pupae hatch into adults ~ 7 days




41 Sarcoptes scabiei Mange mite REPORTABLE in some states Skin scraping
Tx: Ivermectin, Eprinomectin, Doramectin


43 Cattle Grub or Warbles Hypoderma bovis or Hypoderma lineatum
Significance: hide and flesh damage = economic loss, irritation = weight loss and decreased milk production Diagnosis: look for breathing pores or eggs on coat Treatment: Avermectins

44 Cattle Grub



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