Cattle Parasites - Amazon S3

Cattle Parasites - Amazon S3

Cattle Parasites Intestinal Nematodes Loss of appetite

Immuno-suppression Destruction of gastric glands and interference with protein digestion Loss of tissue fluid 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) Strongyles

Trichostrongyles Ostertagia Recognized ostertagi

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

Ostertagia ostertagi

Brown stomach worm 6-10 mm Larvae destroy gastric glands

Severe diarrhea & weight loss Fecal flotation Tx: Albendazole, Fenbendazole, Ivermectin, Moxidextin Cooperia spp.

Cattle bankrupt worm 4-8 mm D+

Anorexia Depressed growth Synergistic with Ostertagia ostertagia Fecal flotation Tx: Albendazole, Fenbendazole, Ivermectin, Moxidectin

Bunostomum spp. Hookworm 10-28 mm

Anemia D+ Weight loss Fecal flotation Tx: Albendazole, Fenbendazole, Ivermectin, Moxidectin

Trichuris ovis Whipworm 2-3 mm

Rarely pathogenic Fecal flotation Tx: Fenbendazole, Ivermectin Capillaria sp. Capillary

5-8 worm mm Mostly nonpathogenic

Fecal flotation Tx: None tested Dictyocaulus viviparus

Lungworm 3-8 cm Cough Dyspnea Lethargy Baermann technique, fecal flotation

Tx: Albendazole, Fenbendazole, Ivermectin, Moxidectin Fasciola hepatica Common 3-4

liver fluke cm Hepatic trauma Hepatitis

Death Fecal sedimentation Tx: Albendazole, Clorsulon, Nitroxynil, Raoxanide Moniezia benedeni Tapeworm

Up to 100 cm Mostly nonpathogenic Proglottids on stool, fecal flotation Tx: Albendazole, Dichlorophen,

Fenbendazole, Niclosamide Tritrichomonas foetus Trich Protozoan 10-25

um Early abortion storms Pyometra Preputial washings & culture Tx: Ipronidazole, Metronidazole

Babesia bigemina Babesia, Texas Cattle Fever 2-3 um x 4-5 um

Anemia Fever Splenomegaly Blood smear Tx: Antibiotics, Dip for ticks

Eimeria spp. Coccidia 16-47 um x 13-32 um Bloody diarrhea

Death Decreased production D+ Fecal flotation Tx: Amprolium, Sulfamethazine

Cryptosporidium spp. Crypto 6 um x 6 um Zoonotic

D+ Fecal flotation Tx: Supportive care Cochliomyia hominivorax Screwworm

Up to 15 mm REPORTABLE Maggots penetrate tissue Identify larvae

Tx: Ivermectin, Organophosphates 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 Sarcoptes scabiei Mange mite

REPORTABLE in some states Skin scraping Tx: Ivermectin, Eprinomectin, Doramectin 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 Cattle Grub

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