Pulex Irritans.
Reading edition
(Synonym: Common Flea.)
Describe the cutaneous disturbance produced by the pulex irritans.
It consists of an erythematous spot with a minute central hemorrhagic point. In irritable skin, a wheal-like lesion may result.
Treatment consists of applications of camphor or ammonia-water; carbolic acid and thymol lotions are also useful.
RELATIVE FREQUENCY OF THE VARIOUS DISEASES OF SKIN AS SHOWN BY THE STATISTICS (123,746 CASES) OF THE AMERICAN DERMATOLOGICAL ASSOCIATION FOR TEN YEARS, 1878-87.
CLASSIFICATION OF DISEASES.No. Cases.% Cases.CLASSIFICATION OF DISEASES.No. Cases.% Cases.
Class I. Disorders of the Glands. Verruca necrogenica 2 .001
1. OF THE SWEAT GLANDS. Nævus pigmentosus88 .064
Hyperidrosis328.265 Xerosis 100 .080
Sudamen268.216 Ichthyosis 309 .249
Anidrosis11.009 Onychauxis 70 .056
Bromidrosis112.090 Hypertdichosis 515 .416
Chromidrosis7.0053. OF CONNECTIVE TISSUE.
Uridrosis........ Sclerema neonatorum.... ....
2. OF THE SEBACEOUS GLANDS238.193 Scleroderma38 0.030
Seborrhœa:1812 1.47 Morphœa 39 0.031
a. oleosa367.296 Elephantiasis57 0.046
b. sicca395.319 Rosacea: 785 0.634
Comedo1225.989 a. erythematosa 381 0.308
Cyst6.004 b. hypertrophica 58 0.047
a. Milium225.183 Frambœsia 22 0.018
b. Steatoma 151 .122Class V. Atrophies.
Asteatosis 8 .0061. OF PIGMENT.
Class II. Inflammations. Leucoderma 77 0.062
Exanthemata1770 1.43 Albinismus 9 0.008
Erythema simplex1064 .859 Vitiligo 191 0.155
Erythema multiforme: 915 .730 Canities 43 0.035
a. papulosum 325 .2622. OF HAIR.
b. bullosum37 .029 Alopecia 926 0.749
c. nodosum82 .066 Alopecia furfuracea 830 0.67
Urticaria2994 2.47 Alopecia areata 794 0.641
pigmentosa 1 .0008 Atrophia pilorum propria 23 0.019
[E]Dermatitis: 1720 1.39 Trichorexis nodosa 3 0.002
a. traumatica 468 .3783. OF NAIL 26 0.021
b. venenata 616 .498 Atrophia unguis19 0.015
c. calorica 224 .1874. OF CUTIS 6 0.005
d. medicamentosa 108 .087 Atrophia senilis 15 0.013
e. gangrænosa 8 .006 Atrophia maculosa et striata 23 0.019
Erysipelas 1026 .829Class VI. New Growths.
Furunculus 2129 1.72 1. OF CONNECTIVE TISSUE. 1 0.0008
Anthrax 252 .203 Keloid 152 0.124
Phlegmona diffusa 265 .215 Cicatrix 89 0.065
Pustula maligna 197 .159 Fibroma93 0.075
Herpes simplex 2057 1.66 Neuroma11 0.009
Herpes zoster1428 1.15 Xanthoma 69 0.056
Dermatitis herpetiformis 41 .0332. OF MUSCULAR TISSUE.
Psoriasis4131 3.34 Myoma 1 0.0008
Pityriasis maculuta et circinata71 .0573. OF VESSELS.
Dermatitis exfoliativa 16 .012 Angioma 462 0.373
Pityriasis rubra 44 .032 Angioma pigmentosum et atrophicum 13 0.010
Lichen: 144 .116 Angioma cavernosum 22 0.018
a. planus 154 .124 Lymphangioma 16 .012
b. ruber 27 .0214. Mycosis fongoide 1 .0008
Eczema: 37661 30.43 Rhinoscleroma 3 .002
a. erythematosum .... .... Lupus erythematosus 477 .385
b. papulosum .... .... Lupus vulgaris 536 .433
c. vesiculosum .... .... Scrofuloderma 663 .536
d. madidans.... .... Syphiloderma: 13888 11.22
e. pustulosum.... .... a. erythematosum .... ....
f. rubrum.... .... b. papulosum .... ....
g. squamosum .... .... c. pustulosum.... ....
Prurigo34 .027 d. tuberculosum.... ....
Acne 9077 7.34 e. gummatosum.... ....
Acne rosacea 398 .321 Lepra: 24 .020
Sycosis 227 .185 a. tuberosa 7 .005
Impetigo 1769 1.43 b. maculosa 4 .003
Impetigo contagiosa 600 .485 c. anæsthetica 6 .004
Impetigo herpetiformis 10 .009 Carcinoma1068 .863
Ecthyma 726 .587 Sarcoma55 .044
Pemphigus 183 .148Class VII. Neuroses.
Ulcers 3021 2.44 Hyperæsthesia: 4 .003
Class III. Hemorrhages. a. Pruritus2716 2.12
Purpura: 341 .275 b. Dermatalgia 11 .009
a. simplex 181 .145 Anæsthesia 22 .018
b. hæmorrhagica 49 .039Class VIII. Parasitic Affections.
Class IV. Hypertrophies.1. VEGETABLE.
1. OF PIGMENT. Tinea favosa 354 .286
Lentigo 127 .103 Tinea trichophytina: 2289 1.85
Chloasma 560 .452 a. circinata 705 .569
2. OF EPIDERMAL AND PAPILLARY LAYERS. b. tonsurans 675 .545
Keratosis:94 .076 c. sycosis 365 .295
a. pilaris 103 .083 Tinea versicolor 1263 1.02
b. senilis 68 .0552. ANIMAL.
Molluscum epitheliale 172 .139 Scabies3192 2.58
Callositas 110 .090 Pediculosis capillitii 2579 2.09
Clavus 84 .068 Pediculosis corporis 1704 1.38
Cornu cutaneum 42 .034 Pediculosis pubis 436 .352
Verruca1252 1.09 Total 123746