"black fever" meaning in English

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  "etymology_text": "* (visceral leishmaniasis): Compare kala-azar.",
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      "expansion": "black fever (uncountable)",
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  "lang_code": "en",
  "pos": "noun",
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          "kind": "topical",
          "langcode": "en",
          "name": "Insect-borne diseases",
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            "Vector-borne diseases",
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          "name": "Trypanosomal diseases",
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        "Visceral leishmaniasis."
      ],
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        "(pathology) Visceral leishmaniasis."
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      "examples": [
        {
          "ref": "1964, James Baldwin, Blues for Mister Charlie, Dell, act 3, page 140:",
          "text": "What name could I have called? Richard would say that you've got—black fever.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Synonym of jungle fever"
      ],
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      "links": [
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          "jungle fever",
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        "(slang) Synonym of jungle fever"
      ],
      "related": [
        {
          "_dis1": "0 100",
          "word": "Asian fever"
        },
        {
          "_dis1": "0 100",
          "word": "blue fever"
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        {
          "_dis1": "0 100",
          "word": "jungle fever"
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        {
          "_dis1": "0 100",
          "word": "white fever"
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          "_dis1": "0 100",
          "word": "yellow fever"
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          "word": "jungle fever"
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  "word": "black fever"
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  "etymology_text": "* (visceral leishmaniasis): Compare kala-azar.",
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  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "Asian fever"
    },
    {
      "word": "blue fever"
    },
    {
      "word": "jungle fever"
    },
    {
      "word": "white fever"
    },
    {
      "word": "yellow fever"
    }
  ],
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        "en:Trypanosomal diseases"
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        "(slang) Synonym of jungle fever"
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          "word": "jungle fever"
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  "word": "black fever"
}