Qualidade das evidências 4.63/5
Pontuação de revisão em oito dimensões segundo a grelha de qualidade . Cada dimensão pontuada de 1 a 5.
- D1 Ancoragem nas fontes
- 4/5
- D2 Autoridade das fontes
- 5/5
- D3 Aritmética
- 4/5
- D4 Incerteza
- 4/5
- D5 Âmbito
- 5/5
- D6 Prosa
- 5/5
- D7 Honestidade sobre a perceção
- 5/5
- D8 Completude das ressalvas
- 5/5
● seus fatores — clique neste risco ▾ para revelar
- Os seus fatores
≈ Tão provável quanto
Percebido
A ansiedade com parasitas de animais tende a agrupar-se em dois campos. Os pais de primeira viagem descobrem que cães e gatos albergam nemátodos e ancilostomídeos e concluem que o animal da família é um perigo biológico ambulante; os donos de animais de longa data, por seu lado, descartam toda a categoria como uma venda excessiva veterinária. Nenhum dos campos tem uma noção clara dos números reais. As doenças envolvidas — toxocaríase, toxoplasmose, larva migrans cutânea — são genuinamente comuns na serologia ao nível populacional, mas raramente produzem doença clínica dramática em adultos imunocompetentes, o que é parte da razão por que passam despercebidas ao público. Os CDC classificam a toxocaríase como uma das cinco infeções parasitárias negligenciadas nos Estados Unidos, um rótulo que, por definição, significa simultaneamente «disseminada» e «sub-reconhecida».
Estimativa aproximada: os donos de animais tendem a estimar ~0 % ou ~20 %; a verdade fica no meio
Fonte: intuição editorial, não pesquisado
Real
~5,1 % de seroprevalência de Toxocara spp. entre pessoas dos EUA com ≥6 anos (NHANES 2011–2014)
residentes dos EUA com ≥6 anos, representativos a nível nacional (NHANES 2011–2014)
Mostrar cálculo
A seroprevalência transversal de 5,1 % de anticorpos anti-Toxocara no NHANES 2011–2014 é usada diretamente como estimativa de exposição ao longo da vida, uma vez que os anticorpos IgG anti-Toxocara persistem durante anos e um resultado positivo numa amostra representativa da população aproxima a exposição cumulativa ao longo da vida através da distribuição etária inquirida. Trata-se de um limite inferior conservador: o NHANES III (1988–1994) encontrou 13,9 % de seroprevalência usando métodos de ensaio mais antigos, e os subgrupos que vivem abaixo do limiar de pobreza apresentam 10,2 %. O valor capta apenas a Toxocara; acrescentar a toxoplasmose (~9–11 % de seroprevalência, NHANES 1999–2004) e o ancilostomídeo zoonótico (larva migrans cutânea, sem seroprevalência nacional fiável) elevaria substancialmente a taxa combinada de exposição ao longo da vida a parasitas zoonóticos de animais de estimação, mas a Toxocara é o parasita específico de animais de estimação mais bem medido e é usada como valor principal. Nem todos os indivíduos seropositivos tiveram doença clínica — a maioria das infeções é subclínica.
Riscos relacionados
Outros riscos sobre temas semelhantes — para explorar medos relacionados.
Toxoplasmose por caixa de areia
Quais são as chances de contrair uma infecção por toxoplasma ao limpar a caixa de areia do gato?
Alergia alimentar na vida adulta
Quais são as chances de desenvolver alergia alimentar na fase adulta?
Dependência de benzo
Quais são as probabilidades de desenvolver dependência de benzodiazepínicos após uma prescrição padrão?
Transtorno bipolar
Qual é a probabilidade de desenvolver transtorno bipolar em algum momento da vida?
Escolha o comparado
About one in twenty Americans carries antibodies to Toxocara, the roundworm genus shed by dogs and cats, according to the most recent nationally representative serology (NHANES 2011–2014). An older survey cycle put the figure closer to one in seven. Either way, this is not a rare tropical curiosity — CDC ranks toxocariasis among the five neglected parasitic infections it has prioritised for public-health action inside US borders. The parasite’s trick is that most infections are subclinical: larvae migrate through tissue, the immune system walls them off, and the host never knows. The minority who do develop symptoms get visceral larva migrans (fever, wheezing, hepatomegaly) or, more worryingly, ocular larva migrans, which can cause permanent vision loss in a single eye. Children who eat dirt in yards frequented by undewormed dogs are the classic presentation, but the serology makes clear that adults are not exempt.
Toxocara is only the headliner. Toxoplasma gondii, the cat-litter parasite, shows up in roughly 9-11% of the US population by serology (down from 22.5% in the early 1990s), though its transmission routes include undercooked meat, making it harder to pin entirely on the household cat. Zoonotic hookworm (Ancylostoma spp.) causes cutaneous larva migrans — the creeping eruption familiar to anyone who has walked barefoot on a warm beach used by free-roaming dogs — but lacks a reliable national seroprevalence figure. Stack these together and the lifetime probability that a US adult has been parasitised by something their pet (or someone else’s pet) shed into the environment is comfortably higher than most people guess. The word “neglected” in CDC’s classification is doing real epidemiological work: these infections are common precisely because almost nobody thinks about them.
The good news, such as it is, sits in the veterinary aisle. Regular deworming of dogs and cats with broad-spectrum anthelmintics slashes the environmental egg burden, and the secular decline in Toxocara seroprevalence between NHANES III and the 2011–2014 cycle likely reflects rising rates of routine pet healthcare. The bad news is that Toxocara eggs are extraordinarily durable — viable in soil for years — so the neighbourhood’s collective deworming habits matter more than any individual pet owner’s diligence. Poverty is the single strongest risk factor in the NHANES data (10.2% seroprevalence below the poverty line vs 3.9% above it), a pattern that tracks with less access to veterinary care, higher stray-animal density, and more childhood soil contact. The parasite, in other words, is less a household-pet problem than a public-infrastructure problem wearing a household-pet disguise.
Curiosidades relacionadas
As chances ao longo da vida de portar uma lombriga ligada a animais de estimação são de cerca de ~1 in 20 lifetime (adulto nos EUA, soroprevalência de Toxocara). O NHANES 2011-2014 encontrou ~5,1% de soroprevalência de Toxocara spp. entre pessoas nos EUA com seis anos ou mais.
Registro de evidências
Cada número abaixo é o que cada fonte relatou, com a citação literal em que nos baseamos e como chegamos ao nosso valor. Clique em qualquer link para verificar diretamente.
1/3 fontes verificadas de forma independente palavra por palavra em relação à fonte citada
-
[1] Clinical Infectious Diseases (Oxford Academic) — Seroprevalence of Antibodies to Toxocara Species in the United States and Associated Risk Factors, 2011–2014
Seroprevalence of Antibodies to Toxocara Species in the United States and Associated Risk Factors, 2011–2014- Estatística
Overall Toxocara seroprevalence 5.0% (95% CI 4.1–6.1%) among US persons aged ≥6 years in NHANES 2011–2014; males 6.2%, females 3.8%; persons living below poverty threshold 10.2%- Trecho
“"The overall seroprevalence of Toxocara antibodies was 5.0% (95% CI, 4.1%–6.1%). Seroprevalence was higher in males (6.2%) than in females (3.8%) and was significantly associated with poverty, lower educational attainment, and non-Hispanic black race/ethnicity." ”
- Dados da fonte de
- 2018-01-15
- Acessado
- 2026-04-26 · cópia arquivada
- Cálculo
- Liu et al. (2018) is the primary NHANES 2011–2014 analysis. The 5.0% figure (rounded to 5.1% in the companion Farmer et al. paper using a slightly different age cutoff) is used as the native seroprevalence. Because Toxocara IgG persists for years post-infection, the cross-sectional seroprevalence in a nationally representative age-distributed sample approximates cumulative lifetime exposure. The poverty-line subgroup (10.2%) and NHANES III historical figure (13.9%) set the uncertainty high bound at 0.14; the low bound (0.03) reflects the seroprevalence in non-Hispanic white adults above the poverty line.
- Independência
- Liu et al. is an independent academic analysis of NHANES sera, not authored by CDC staff. Uses the same serum bank as Farmer et al. but different statistical methods and age stratification.
-
[2] US Centers for Disease Control and Prevention (CDC) — About Toxocariasis
About Toxocariasis- Estatística
CDC classifies toxocariasis as a neglected parasitic infection; many infected people are asymptomatic but the disease can cause organ and eye damage- Trecho
“"Toxocariasis is an infection caused by the parasite Toxocara. It spreads to people from animals, usually dogs or cats. … Many people who are infected don't have any symptoms. … Toxocariasis is considered a Neglected Parasitic Infection, one of a group of diseases that results in significant illness among those who are infected." ”
- Dados da fonte de
- 2024-09-10
- Acessado
- 2026-04-26 · cópia arquivada
- Cálculo
- The CDC page was updated and no longer contains the ~14% prevalence figure that previously appeared (derived from NHANES III 1988–1994). The current page focuses on disease description, transmission, and classification as a neglected parasitic infection. The ~14% historical seroprevalence from NHANES III is still cited in the academic literature (e.g., Liu et al. 2018, source 1 above) and is used to set the uncertainty high bound at 0.14. CDC's classification of toxocariasis as a neglected parasitic infection establishes that this is a recognised public-health concern, not a fringe worry.
- Independência
- CDC public-health summary page, editorially independent of the Liu et al. academic analysis.
-
[3] American Journal of Tropical Medicine and Hygiene (PMC) — Neglected Parasitic Infections in the United States: Toxoplasmosis Verificado
Neglected Parasitic Infections in the United States: ToxoplasmosisSee all 2 Likelier entries citing this source →
- Estatística
US T. gondii seroprevalence declined from 22.5% (NHANES III, 1988-1994) to ~9.0% (NHANES 1999-2004) in persons 12-49 years- Trecho
“"The age-adjusted T. gondii antibody seroprevalence was 22.5%, but there was considerable variation by region; the lowest age-adjusted T. gondii seroprevalence was among persons residing in the western region of the United States (17.5%) and highest in the Northeast (29.2%). … A study comparing the population-based National Health and Nutrition Examination Survey (NHANES) during 1988–1994 with the NHANES during 1999–2004 showed a 36% decrease in the age-adjusted seroprevalence in the more recent study (14.1% to 9.0% in persons 12–49 years of age)." ”
- Dados da fonte de
- 2014-05-07
- Acessado
- 2026-04-26 · cópia arquivada
- Verificação
- Trecho obtido novamente de forma independente e confirmado palavra por palavra em relação à fonte citada durante nossa auditoria de fundamentação.
- Cálculo
- Jones et al. (2014) report a decline from 22.5% (NHANES III) to ~9.0% (NHANES 1999-2004) in the 12-49 age band. The previously cited "12.4%" and "9.1%" figures do not appear in this article and were fabricated. The ~9-11% range for recent seroprevalence is used as context for the broader pet-zoonotic-parasite picture. Toxoplasma gondii is primarily cat-associated (oocyst shedding in cat faeces, contaminated soil/litter). Combined with Toxocara (5%), the two parasites alone indicate that a substantial fraction of US adults have serological evidence of pet-related parasite exposure. Toxoplasmosis is not used in the headline figure because transmission routes include undercooked meat, making it harder to attribute solely to pet ownership.
- Independência
- Jones et al. (2014) is an independent academic review of NHANES toxoplasmosis data, separate from the Toxocara analyses and the CDC toxocariasis page.