Prophylaxis with Single-Dose Doxycycline for the Prevention of Lyme Disease after an Ixodes scapularis Tick Bite

This large trial shows the efficacy of a single, prophylactic dose of doxycycline to prevent Lyme disease. Lyme disease is transmitted by the bite of an Ixodes scapularis tick and is the most common vector-borne disease in the United States. 1 This infection may be prevented by vaccination. 2 , 3 Ho...

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Published inThe New England journal of medicine Vol. 345; no. 2; pp. 79 - 84
Main Authors Nadelman, Robert B, Nowakowski, John, Fish, Durland, Falco, Richard C, Freeman, Katherine, McKenna, Donna, Welch, Peter, Marcus, Robert, Agüero-Rosenfeld, Maria E, Dennis, David T, Wormser, Gary P
Format Journal Article Conference Proceeding
LanguageEnglish
Published Boston, MA Massachusetts Medical Society 12.07.2001
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Abstract This large trial shows the efficacy of a single, prophylactic dose of doxycycline to prevent Lyme disease. Lyme disease is transmitted by the bite of an Ixodes scapularis tick and is the most common vector-borne disease in the United States. 1 This infection may be prevented by vaccination. 2 , 3 However, the vaccine's general acceptance is likely to be limited by its cost (a cost to the pharmacist of $61.25 per dose) and the need for multiple doses to achieve and maintain protection. 2 , 3 In addition, the vaccine is less than 100 percent effective and is currently approved only for persons 15 to 70 years of age. 3 Antimicrobial prophylaxis for persons with I. scapularis tick bites may be a . . .
AbstractList It is unclear whether antimicrobial treatment after an Ixodes scapularis tick bite will prevent Lyme disease. In an area of New York where Lyme disease is hyperendemic, we conducted a randomized, double-blind, placebo-controlled trial of treatment with a single 200-mg dose of doxycycline in 482 subjects who had removed attached I. scapularis ticks from their bodies within the previous 72 hours. At base line, three weeks, and six weeks, subjects were interviewed and examined, and serum antibody tests were performed, along with blood cultures for Borrelia burgdorferi. Erythema migrans developed at the site of the tick bite in a significantly smaller proportion of the subjects in the doxycycline group than of those in the placebo group (1 of 235 subjects [0.4 percent] vs. 8 of 247 subjects [3.2 percent], P<0.04). The efficacy of treatment was 87 percent (95 percent confidence interval, 25 to 98 percent). Objective extracutaneous signs of Lyme disease did not develop in any subject, and there were no asymptomatic serocon-versions. Treatment with doxycycline was associated with more frequent adverse effects (in 30.1 percent of subjects, as compared with 11.1 percent of those assigned to placebo; P<0.001), primarily nausea (15.4 percent vs. 2.6 percent) and vomiting (5.8 percent vs. 1.3 percent). Erythema migrans developed more frequently after untreated bites from nymphal ticks than after bites from adult female ticks (8 of 142 bites [5.6 percent] vs. 0 of 97 bites [0 percent], P=0.02). A single 200-mg dose of doxycycline given within 72 hours after an I. scapularis tick bite can prevent the development of Lyme disease.
Background It is unclear whether antimicrobial treatment after an Ixodes scapularis tick bite will prevent Lyme disease. Methods In an area of New York where Lyme disease is hyperendemic, we conducted a randomized, double-blind, placebo-controlled trial of treatment with a single 200-mg dose of doxycycline in 482 subjects who had removed attached I. scapularis ticks from their bodies within the previous 72 hours. At base line, three weeks, and six weeks, subjects were interviewed and examined, and serum antibody tests were performed, along with blood cultures for Borrelia burgdorferi . Results Erythema migrans developed at the site of the tick bite in a significantly smaller proportion of the subjects in the doxycycline group than of those in the placebo group (1 of 235 subjects [0.4 percent] vs. 8 of 247 subjects [3.2 percent], P<0.04). The efficacy of treatment was 87 percent (95 percent confidence interval, 25 to 98 percent). Objective extracutaneous signs of Lyme disease did not develop in any subject, and there were no asymptomatic seroconversions. Treatment with doxycycline was associated with more frequent adverse effects (in 30.1 percent of subjects, as compared with 11.1 percent of those assigned to placebo; P<0.001), primarily nausea (15.4 percent vs. 2.6 percent) and vomiting (5.8 percent vs. 1.3 percent). Erythema migrans developed more frequently after untreated bites from nymphal ticks than after bites from adult female ticks (8 of 142 bites [5.6 percent] vs. 0 of 97 bites [0 percent], P=0.02). Conclusions A single 200-mg dose of doxycycline given within 72 hours after an I. scapularis tick bite can prevent the development of Lyme disease.
It is unclear whether antimicrobial treatment after an Ixodes scapularis tick bite will prevent Lyme disease. In an area of New York where Lyme disease is hyperendemic we conducted a randomized, double-blind, placebo-controlled trial of treatment with a single 200-mg dose of doxycycline in 482 subjects who had removed attached I. scapularis ticks from their bodies within the previous 72 hours. At base line, three weeks, and six weeks, subjects were interviewed and examined, and serum antibody tests were performed, along with blood cultures for Borrelia burgdorferi. Entomologists confirmed the species of the ticks and classified them according to sex, stage, and degree of engorgement. Erythema migrans developed at the site of the tick bite in a significantly smaller proportion of the subjects in the doxycycline group than of those in the placebo group (1 of 235 subjects [0.4 percent] vs. 8 of 247 subjects [3.2 percent], P<0.04). The efficacy of treatment was 87 percent (95 percent confidence interval, 25 to 98 percent). Objective extracutaneous signs of Lyme disease did not develop in any subject, and there were no asymptomatic seroconversions. Treatment with doxycycline was associated with more frequent adverse effects (in 30.1 percent of subjects, as compared with 11.1 percent of those assigned to placebo; P<0.001), primarily nausea (15.4 percent vs. 2.6 percent) and vomiting (5.8 percent vs. 1.3 percent). Erythema migrans developed more frequently after untreated bites from nymphal ticks than after bites from adult female ticks (8 of 142 bites [5.6 percent] vs. 0 of 97 bites [0 percent], P=0.02) and particularly after bites from nymphal ticks that were at least partially engorged with blood (8 of 81 bites [9.9 percent], as compared with 0 of 59 bites from unfed, or flat, nymphal ticks [0 percent]; P=0.02). A single 200-mg dose of doxycycline given within 72 hours after an I. scapularis tick bite can prevent the development of Lyme disease.
This large trial shows the efficacy of a single, prophylactic dose of doxycycline to prevent Lyme disease. Lyme disease is transmitted by the bite of an Ixodes scapularis tick and is the most common vector-borne disease in the United States. 1 This infection may be prevented by vaccination. 2 , 3 However, the vaccine's general acceptance is likely to be limited by its cost (a cost to the pharmacist of $61.25 per dose) and the need for multiple doses to achieve and maintain protection. 2 , 3 In addition, the vaccine is less than 100 percent effective and is currently approved only for persons 15 to 70 years of age. 3 Antimicrobial prophylaxis for persons with I. scapularis tick bites may be a . . .
It is unclear whether antimicrobial treatment after an Ixodes scapularis tick bite will prevent Lyme disease.BACKGROUNDIt is unclear whether antimicrobial treatment after an Ixodes scapularis tick bite will prevent Lyme disease.In an area of New York where Lyme disease is hyperendemic we conducted a randomized, double-blind, placebo-controlled trial of treatment with a single 200-mg dose of doxycycline in 482 subjects who had removed attached I. scapularis ticks from their bodies within the previous 72 hours. At base line, three weeks, and six weeks, subjects were interviewed and examined, and serum antibody tests were performed, along with blood cultures for Borrelia burgdorferi. Entomologists confirmed the species of the ticks and classified them according to sex, stage, and degree of engorgement.METHODSIn an area of New York where Lyme disease is hyperendemic we conducted a randomized, double-blind, placebo-controlled trial of treatment with a single 200-mg dose of doxycycline in 482 subjects who had removed attached I. scapularis ticks from their bodies within the previous 72 hours. At base line, three weeks, and six weeks, subjects were interviewed and examined, and serum antibody tests were performed, along with blood cultures for Borrelia burgdorferi. Entomologists confirmed the species of the ticks and classified them according to sex, stage, and degree of engorgement.Erythema migrans developed at the site of the tick bite in a significantly smaller proportion of the subjects in the doxycycline group than of those in the placebo group (1 of 235 subjects [0.4 percent] vs. 8 of 247 subjects [3.2 percent], P<0.04). The efficacy of treatment was 87 percent (95 percent confidence interval, 25 to 98 percent). Objective extracutaneous signs of Lyme disease did not develop in any subject, and there were no asymptomatic seroconversions. Treatment with doxycycline was associated with more frequent adverse effects (in 30.1 percent of subjects, as compared with 11.1 percent of those assigned to placebo; P<0.001), primarily nausea (15.4 percent vs. 2.6 percent) and vomiting (5.8 percent vs. 1.3 percent). Erythema migrans developed more frequently after untreated bites from nymphal ticks than after bites from adult female ticks (8 of 142 bites [5.6 percent] vs. 0 of 97 bites [0 percent], P=0.02) and particularly after bites from nymphal ticks that were at least partially engorged with blood (8 of 81 bites [9.9 percent], as compared with 0 of 59 bites from unfed, or flat, nymphal ticks [0 percent]; P=0.02).RESULTSErythema migrans developed at the site of the tick bite in a significantly smaller proportion of the subjects in the doxycycline group than of those in the placebo group (1 of 235 subjects [0.4 percent] vs. 8 of 247 subjects [3.2 percent], P<0.04). The efficacy of treatment was 87 percent (95 percent confidence interval, 25 to 98 percent). Objective extracutaneous signs of Lyme disease did not develop in any subject, and there were no asymptomatic seroconversions. Treatment with doxycycline was associated with more frequent adverse effects (in 30.1 percent of subjects, as compared with 11.1 percent of those assigned to placebo; P<0.001), primarily nausea (15.4 percent vs. 2.6 percent) and vomiting (5.8 percent vs. 1.3 percent). Erythema migrans developed more frequently after untreated bites from nymphal ticks than after bites from adult female ticks (8 of 142 bites [5.6 percent] vs. 0 of 97 bites [0 percent], P=0.02) and particularly after bites from nymphal ticks that were at least partially engorged with blood (8 of 81 bites [9.9 percent], as compared with 0 of 59 bites from unfed, or flat, nymphal ticks [0 percent]; P=0.02).A single 200-mg dose of doxycycline given within 72 hours after an I. scapularis tick bite can prevent the development of Lyme disease.CONCLUSIONSA single 200-mg dose of doxycycline given within 72 hours after an I. scapularis tick bite can prevent the development of Lyme disease.
Author Marcus, Robert
Fish, Durland
Falco, Richard C
Wormser, Gary P
Dennis, David T
Nadelman, Robert B
Agüero-Rosenfeld, Maria E
Nowakowski, John
Freeman, Katherine
McKenna, Donna
Welch, Peter
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https://www.ncbi.nlm.nih.gov/pubmed/11450675$$D View this record in MEDLINE/PubMed
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10.1093/infdis/159.1.136
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10.1016/0002-9343(90)90122-T
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Issue 2
Keywords Lyme disease
Chemoprophylaxis
Spirochaetaceae
Toxicity
Ixodes scapularis
Prevention
Acari
Bacteria
Adult
Ixodidae
Spirachaetosis
Human
Parasitiformes
Borrelia burgdorferi
Spirochaetales
Treatment efficiency
Tetracycline derivatives
Borrelia infection
Single dose
Infection
Arachnida
Chemotherapy
Treatment
Ixodida
Arthropoda
Doxycycline
Bacteriosis
Double blind study
Invertebrata
Language English
License CC BY 4.0
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PublicationTitle The New England journal of medicine
PublicationTitleAlternate N Engl J Med
PublicationYear 2001
Publisher Massachusetts Medical Society
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Snippet This large trial shows the efficacy of a single, prophylactic dose of doxycycline to prevent Lyme disease. Lyme disease is transmitted by the bite of an Ixodes...
It is unclear whether antimicrobial treatment after an Ixodes scapularis tick bite will prevent Lyme disease. In an area of New York where Lyme disease is...
Background It is unclear whether antimicrobial treatment after an Ixodes scapularis tick bite will prevent Lyme disease. Methods In an area of New York where...
It is unclear whether antimicrobial treatment after an Ixodes scapularis tick bite will prevent Lyme disease. In an area of New York where Lyme disease is...
It is unclear whether antimicrobial treatment after an Ixodes scapularis tick bite will prevent Lyme disease.BACKGROUNDIt is unclear whether antimicrobial...
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StartPage 79
SubjectTerms Adolescent
Adult
Aged
Aged, 80 and over
Animals
Anti-Bacterial Agents - administration & dosage
Anti-Bacterial Agents - adverse effects
Antibacterial agents
Antibiotic Prophylaxis
Antibiotics
Antibiotics. Antiinfectious agents. Antiparasitic agents
Bacterial diseases
Biological and medical sciences
Bites and Stings
Borrelia burgdorferi
Borrelia burgdorferi Group - isolation & purification
Borrelia infections
Child
Clinical trials
Double-Blind Method
doxycycline
Doxycycline - administration & dosage
Doxycycline - adverse effects
Drug therapy
Erythema Chronicum Migrans - prevention & control
Female
Human bacterial diseases
Humans
Infectious diseases
Ixodes - growth & development
Ixodes scapularis
Ixodidae
Lyme disease
Lyme Disease - prevention & control
Lyme Disease - transmission
Male
Medical sciences
Middle Aged
Nymph
Pharmacology. Drug treatments
Preventive medicine
Tropical bacterial diseases
USA, New York
Title Prophylaxis with Single-Dose Doxycycline for the Prevention of Lyme Disease after an Ixodes scapularis Tick Bite
URI http://dx.doi.org/10.1056/NEJM200107123450201
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