Cestodes (Tapeworms)

Taenia saginata, also known as beef tapeworm, is a parasitic flatworm that infects humans through the consumption of undercooked beef. It is a common cause of tapeworm infections in humans worldwide. The adult tapeworm resides in the human intestine and can grow up to several meters in length. It is characterized by its long, ribbon-like body with numerous segments called proglottids. Each proglottid contains thousands of eggs, which are shed in the feces and can contaminate the environment. Ingestion of these eggs by cattle completes the life cycle of the tapeworm. Symptoms of T. saginata infection may include abdominal pain, weight loss, and nausea.

Taenia solium is the scientific name for the pork tapeworm. It is a parasitic worm that infects pigs and humans. The adult worm resides in the intestines of the host, where it can cause various health problems. The tapeworm eggs are usually ingested through contaminated food or water, and can then hatch and form cysts in different organs, including the brain, causing a condition known as neurocysticercosis. This can lead to seizures, headaches, and other neurological symptoms. Therefore, Taenia solium is the correct answer for the given question.

Dipylidium caninum is a type of tapeworm that commonly infects both dogs (canine) and cats (feline). Its larval stage occurs in fleas and biting lice. The appearance of this tapeworm is often described as "honeycomb-like" due to the segments that make up its body.

Anoplocephala perfoliata is a species of tapeworm that commonly infects horses. It is known as the equine tapeworm. This tapeworm can cause health issues in horses, including colic and intestinal blockage. It is important to regularly deworm horses to prevent infestation by Anoplocephala perfoliata and other parasites.

Taenia pisiformis is a species of tapeworm that infects dogs and other canids. It is characterized by having three hooks in its nucleus and a dark border. It is also distinguishable from the common tapeworm Dipylidium caninum by its rectangular and larger proglottids. This tapeworm has rabbits and rodents as intermediate hosts.

The correct answer is Echinococcus spp., Echinococcus spp. This answer suggests that the photo in the document is of tapeworms belonging to the genus Echinococcus. Echinococcus spp. are known to infect both canines and felines, so it aligns with the mention of "Canine/Feline tapeworm" in the question.

Moniezia spp. refers to a genus of tapeworms that infect ruminants, such as cattle and sheep. These tapeworms reside in the small intestines of these animals. The answer "Moniezia spp., Moniezia spp." implies that the question is asking for the name of the tapeworm species that belongs to the Moniezia genus.