{
  "id": "epidemic-records-of-spanish-america",
  "type": "entity",
  "name": "The written epidemic record of Spanish America, and what modern science reads from it",
  "summary": "Almanacs, diaries, cabildo minutes, parish burial books and hospital and cemetery ledgers kept across Spanish America are the reason a 2014 study could assemble 22 typhus epidemics in central Mexico between 1655 and 1918 and set them against tree-ring drought, and a 2024 review could follow a plague along the road between Buenos Aires and Lima month by month. The same researchers say plainly what the record cannot do.",
  "locale": "en",
  "tags": [
    "americas",
    "new-spain",
    "rio-de-la-plata",
    "epidemics",
    "archives",
    "record-keeping",
    "public-health",
    "historiography"
  ],
  "relations": [
    {
      "rel": "related",
      "target": "cocoliztli-epidemic-of-1576"
    },
    {
      "rel": "related",
      "target": "relaciones-geograficas-de-indias"
    },
    {
      "rel": "related",
      "target": "ordenanzas-del-archivo-general-de-indias-1790"
    },
    {
      "rel": "related",
      "target": "hospitales-de-indios-de-los-andes"
    },
    {
      "rel": "related",
      "target": "enumeracion-de-revillagigedo-1790-1794"
    },
    {
      "rel": "related",
      "target": "hospital-returns-in-print-1787-1794"
    },
    {
      "rel": "related",
      "target": "avisos-para-los-naturales-1769"
    },
    {
      "rel": "related",
      "target": "hospital-de-san-lazaro-de-mexico"
    },
    {
      "rel": "related",
      "target": "extramural-cemeteries-in-the-indies"
    },
    {
      "rel": "related",
      "target": "villalba-epidemiologia-espanola-1803"
    },
    {
      "rel": "related",
      "target": "perez-de-ribas-triunfos-1645"
    },
    {
      "rel": "related",
      "target": "escuela-de-medicina-y-cirugia-de-buenos-aires"
    },
    {
      "rel": "related",
      "target": "traslado-de-la-ciudad-de-guatemala-1773"
    },
    {
      "rel": "related",
      "target": "chimalpahin-relaciones-de-chalco-amaquemecan"
    },
    {
      "rel": "related",
      "target": "escribanos-de-las-indias"
    },
    {
      "rel": "related",
      "target": "spanish-flu-misnomer"
    },
    {
      "rel": "related",
      "target": "annals-of-the-cakchiquels"
    },
    {
      "rel": "related",
      "target": "perez-de-ribas-triunfos-de-nuestra-santa-fee-1645"
    },
    {
      "rel": "related",
      "target": "machoni-arte-lengua-lule-1732"
    },
    {
      "rel": "related",
      "target": "piedra-bezar-de-las-indias"
    },
    {
      "rel": "related",
      "target": "cementerios-extramuros-de-las-indias"
    },
    {
      "rel": "related",
      "target": "terremotos-y-salidas-de-mar-de-las-indias"
    },
    {
      "rel": "related",
      "target": "limpieza-y-empedrado-de-la-ciudad-de-mexico"
    },
    {
      "rel": "related",
      "target": "razon-anual-de-la-ciudad-de-mexico-1796"
    }
  ],
  "questions": [
    "What written records document epidemics in colonial Spanish America?",
    "How do historians reconstruct disease and famine in colonial Mexico?",
    "How did colonial authorities in South America respond to the 1742 plague?",
    "How reliable are colonial records as epidemiological evidence?"
  ],
  "claims": [
    {
      "id": "c1",
      "text": "The classes of document that carry the record are named in the study that used them: almanacs, diaries, personal accounts, and medical and death records from hospitals, physicians, cemeteries and municipalities. From these a record of 22 typhus epidemics in Mexico across 1655-1918 was compiled, including severe outbreaks in 1714, 1785, 1861 and 1909-1911.",
      "sources": [
        "burns-2014-drought-typhus-mexico"
      ],
      "confidence": 0.85
    },
    {
      "id": "c2",
      "text": "The written record is dense enough to be tested against an independent physical archive. The 22 epidemic dates were compared with a Palmer Drought Severity Index reconstructed from tree rings, by superposed epoch analysis and by mapping reconstructed drought across North America in epidemic years; below-average tree growth, reconstructed drought and low crop yields occur with 19 of the 22 epidemics. The association is the study's finding about climate and typhus; what it demonstrates about the documents is that their dates are precise enough to be matched to annual rings at all.",
      "sources": [
        "burns-2014-drought-typhus-mexico"
      ],
      "confidence": 0.8
    },
    {
      "id": "c3",
      "text": "The same authors state the limits without prompting. The exact timing of the onset and withdrawal of drought, famine or epidemic as recorded in historical sources can be ambiguous; gaps and contradictions in the record need to be resolved by more detailed multifocal historical analysis; and reports vary because many authors wrote them and did not describe events consistently, environmental conditions least consistently of all. They also warn that both the archives and the forests that check them are threatened with destruction.",
      "sources": [
        "burns-2014-drought-typhus-mexico"
      ],
      "confidence": 0.9
    },
    {
      "id": "c4",
      "text": "A second body of record supports a much finer resolution in the far south. A 2024 review reconstructs the plague of 1742-1743 spreading in sequence along the Camino Real between Buenos Aires and Lima: rising deaths at Lujan and Santa Fe in late 1741, a peak of 128 deaths at Buenos Aires in June 1742, 160 fatalities at Purisima Concepcion de los Pampas, and one of the region's severest crises at Cordoba, marked by a sharp increase in burials. Bishop Jose de Peralta reported in 1743 that his diocese's population would have nearly doubled but for the mortality.",
      "sources": [
        "villafane-2024-epidemics-south-america-18c"
      ],
      "confidence": 0.7
    },
    {
      "id": "c5",
      "text": "Municipal and ecclesiastical minutes preserve the responses as well as the deaths, including the ones that were not medical. The cabildo of Santa Fe ordered a novena of masses to Saint Jerome on 11 November 1741 and a second to Saint Roch on 9 January 1742. Alongside them the review records quarantines and isolation, temporary hospitals put up for the emergency, tax relief and land redistribution, and hospital building at Lima on a cross plan chosen for ventilation and for separating patients.",
      "sources": [
        "villafane-2024-epidemics-south-america-18c"
      ],
      "confidence": 0.7
    },
    {
      "id": "c6",
      "text": "The counterpoint comes from the same review rather than from outside it. It states that the political objectives of the Bourbon reforms often conflicted with the needs of local populations, and that the well-being of indigenous and enslaved communities was frequently subordinated to imperial interest; and it judges the southern response decentralised and often fragmented against a more systematic and effective one in Mexico City, which it reads as unequal allocation of resources between colonies. A record that preserves its own failures is more useful than one that does not.",
      "sources": [
        "villafane-2024-epidemics-south-america-18c"
      ],
      "confidence": 0.75
    },
    {
      "id": "c7",
      "text": "What these two sources do not license, stated so the object is not read for more than it says. Neither study separates colonial-period documents from republican ones - the Mexican series runs to 1918 and its authors do not distinguish the two regimes' records - so nothing here measures the colonial archive against what came after it, or against other empires. The South American figures reach this corpus through a single-author narrative review and not from the parish and cabildo books themselves, which is why the claims drawn from it carry a confidence of 0.7 and why the source is registered at a reliability below the corpus's usual figure for a peer-reviewed article.",
      "sources": [
        "burns-2014-drought-typhus-mexico",
        "villafane-2024-epidemics-south-america-18c"
      ],
      "confidence": 0.9
    }
  ],
  "takeaways": [],
  "faqs": [],
  "evidence_tier": "secondary",
  "evidence": {
    "level": "industry_observation",
    "source_types": [
      "paper"
    ]
  },
  "moat_flag": false,
  "winning_edge": "Colonial Spanish American epidemics are usually written about for their death tolls; the paperwork that makes those tolls countable is left invisible. This object treats the record itself as the subject and pins it to what two open-access studies actually did with it - 22 typhus epidemics compiled from named classes of document and matched against tree rings, 19 of them coinciding with reconstructed drought, and a 1742-1743 outbreak followed along the Camino Real down to a dated cabildo novena and a monthly burial count. It carries the researchers' own caveats about ambiguity, gaps and inconsistency in the same breath as the results, names the colonial administration's failures from inside the source that reports the responses, and says explicitly what the pairing cannot support: neither study isolates the colonial record, so no comparison with later or foreign archives is claimed here.",
  "confidence": 0.75,
  "last_verified": "2026-08-12",
  "canonical_url": "https://hispanic-legacy.com/k/epidemic-records-of-spanish-america",
  "api_url": "https://hispanic-legacy.com/api/k/epidemic-records-of-spanish-america.json",
  "jsonld": {
    "@context": "https://schema.org",
    "name": "The written epidemic record of Spanish America, and what modern science reads from it",
    "description": "Almanacs, diaries, cabildo minutes, parish burial books and hospital and cemetery ledgers kept across Spanish America are the reason a 2014 study could assemble 22 typhus epidemics in central Mexico between 1655 and 1918 and set them against tree-ring drought, and a 2024 review could follow a plague along the road between Buenos Aires and Lima month by month. The same researchers say plainly what the record cannot do.",
    "url": "https://hispanic-legacy.com/k/epidemic-records-of-spanish-america",
    "license": "https://spdx.org/licenses/CC-BY-4.0.html",
    "dateModified": "2026-08-12",
    "citation": [
      {
        "@type": "CreativeWork",
        "name": "Drought and Epidemic Typhus, Central Mexico, 1655-1918",
        "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC3944858/"
      },
      {
        "@type": "CreativeWork",
        "name": "From Conquests to Epidemics in 18th-Century South America: A Reflection on Social Resilience and Reconstruction: Review of the Literature",
        "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC11586975/"
      }
    ],
    "@type": "Article",
    "headline": "The written epidemic record of Spanish America, and what modern science reads from it"
  }
}