Cellophane tape method

Clear tape containing lice applied to a microscopic slide

Cellophane or scotch tape is used to collect surface mites and fur mites, and lice infestations in animals. The tape is applied sticky side down to collect any white flakes or powdery looking material that is on the skin and hair shafts. It is acceptable to collect a few hairs in this manner to look for nits or organisms clinging to the hair shafts. The tape is applied sticky side down onto a microscopic slide. A drop of oil or water can be placed on the slide between the tape and the slide, but it is not necessary when collecting for large organisms such as lice.

Cellophane tape preparation is also used to detect pinworms, which occur in primates, horses, rabbits, and rodents. The eggs are collected by using the sticky side of the tape against the anus and anal folds. The tape is then applied sticky side down on the slide with a drop of water or oil to reveal the pinworm ova and examined microscopically.

Cymothoa exigua

alieno_pesci

Cymothoa exigua in fish mouth

Cymothoa exigua, or the tongue-eating louse, is a parasitic crustacean of the family Cymothoidae. This parasite enters fish through the gills, and then attaches itself at the base of the fish’s tongue. The female attaches to the tongue and the male attaches on the gill arches beneath and behind the female. Females are 8–29 millimetres (0.3–1.1 in) long and 4–14 mm (0.16–0.55 in) in maximum width. Males are approximately 7.5–15 mm (0.3–0.6 in) long and 3–7 mm (0.12–0.28 in) wide. The parasite destroys the fish’s tongue, and then attaches itself to the stub of what was once its tongue and becomes the fish’s new tongue.

Necropsy Show and Tell

Example of one pathology image that can be found on website

One of the best collection of veterinary pathology images that can be found on-line is available at Dr. John M. King’s Necropsy Show and Tell.

Necropsy Show and Tell is a collection of 35mm slide images of necropsy specimens collected by Dr. John M. King at the Cornell College of Veterinary Medicine over the past 30 years. Selected images have been scanned into the computer and cataloged for your use in these pages. Searches to find individual images are performed by searching on keywords used to catalog each of the images.

Please visit:

https://secure.vet.cornell.edu/nst/