Parasites are everywhere. Why do so few researchers study them?

Parasites in diets and everyday life

• Commenters note that people routinely ingest parasites inadvertently (e.g., in fish), many harmless to humans.
• Some parasites are eaten on purpose (linked article), though at least one claimed delicacy (woodcock pâté with tapeworms) is doubted by French commenters who can’t find evidence for it.
• Parasitic fungi and mushrooms (shiitake, cordyceps) blur lines between food and parasite.

Behavior‑manipulating parasites

• Strong interest in Toxoplasma gondii: it alters rodent and primate fear of felids via amygdala changes and dopamine-related genes; rodent fear pathways are selectively “unwired” and cat odor becomes sexually attractive.
• Human effects are debated; small literature links infection to impulsivity, speeding, and risk-taking.
• Other striking examples: parasitoid wasps turning caterpillars into “bodyguards”; nematomorphs making crickets jump into streams, feeding endangered trout; tongue‑eating isopods that replace fish tongues.
• Some see such parasites as knowing more “practically” about neural circuitry than neuroscientists.

Human perceptions of animals and fear

• Discussion branches into why humans like big cats yet fear spiders and snakes. Theories include aesthetics, eye placement, movement unpredictability, and baby‑schema resemblance.
• Domestication of cats vs. dogs is compared: cats are genetically close to wildcats, seen more as co‑evolved companions; dogs have higher genomic mutability and wider phenotypic plasticity.

Economics and social analogies

• Several suggest modeling economies as ecosystems with parasites and symbionts; others note economics already studies rent‑seeking and externalities, but funding and politics constrain some lines of research.
• Sociology and systems theory are mentioned as adjacent fields.

Why few researchers study parasites

• Funding is a central theme: money follows economic or political payoff; parasites affecting poorer regions get less attention.
• “Charismatic megafauna” attract donors and grants; parasites and obscure insects do not.
• Disgust and disturbing subject matter deter some students.
• Career prospects in parasitology/entomology are described as low‑pay, competitive, and geographically inflexible, though intellectually rewarding.

Disease burden, treatment, and eradication

• Some argue parasites are “neglected tropical diseases” best solved by sanitation and development; others stress many remain poorly treated and lethal.
• Malaria is highlighted as a well‑funded exception (GM mosquitoes, eradication campaigns).
• There is disagreement on whether most human parasites are already discovered, and on how significant single vs. multicellular parasites are.

Tapeworms and health effects

• Personal anecdotes illustrate substantial weight loss from large intestinal worms.
• Debate covers how much energy tapeworms divert (direct consumption, digestive disruption, blood loss), with recognition that symptoms vary widely.

Resources and media

• Multiple recommendations: a parasite museum in Tokyo, the book Parasite Rex, other popular science books, and the podcast “This Week in Parasitism.”