Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Duration of tick attachment necessary for transmission of Anaplasma phagocytophilum by Ixodes scapularis (Acari: Ixodidae) nymphs

Journal Article · · Ticks and Tick-borne Diseases
This study assessed the duration of tick attachment necessary for a successful transmission of Anaplasma phagocytophilum by an infected I. scapularis nymph. Individual nymphs were placed upon BALB/c mice and allowed to feed for predetermined time intervals of 4 to 72 h. Ticks removed from mice at predetermined intervals were tested by PCR for verification of infection and evaluation of the bacterial load. The success of pathogen transmission to mice was assessed by blood-PCR at 7, 14 and 21 days postinfestation, and IFA at 21 days postinfestation. Anaplasma phagocytophilum infection was documented in 10-30 % of mice, from which ticks were removed within the first 20 h of feeding. However, transmission success was ≥70% if ticks remained attached for 36 h or longer. Notably, none of the PCR-positive mice that were exposed to infected ticks for 4 to 8 h and only half of PCR-positive mice exposed for 24 h developed antibodies within 3 weeks postinfestation. On the other hand, all mice with detectable bacteremia after being infested for 36 h seroconverted. This suggests that although some of the ticks removed prior to 24 h of attachment succeed in injecting a small amount of A. phagocytophilum, this amount is insufficient for stimulating humoral immunity and perhaps for establishing disseminated infection in BALB/c mice. Although A. phagocytophilum may be present in salivary glands of unfed I. scapularis nymphs, the amount of A. phagocytophilum initially contained in saliva appears insufficient to cause sustainable infection in a host. Replication and, maybe, reactivation of the agent for 12-24 h in a feeding tick is required before a mouse can be consistently infected.
Research Organization:
Oak Ridge Institute for Science and Education (ORISE), Oak Ridge, TN (United States)
Sponsoring Organization:
Centers for Disease Control and Prevention (CDC); USDOE Office of Science (SC)
Grant/Contract Number:
SC0014664
OSTI ID:
1981783
Journal Information:
Ticks and Tick-borne Diseases, Journal Name: Ticks and Tick-borne Diseases Journal Issue: 6 Vol. 12; ISSN 1877-959X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (41)

Preliminary studies on virus and spirochete accumulation in the cement plug of ixodid ticks journal December 1996
Ultrastructural studies on sporogony of Babesia microti in salivary gland cells of the tick Ixodes dammini journal May 1983
Prevention of borreliosis in persons bitten by infected ticks journal March 1996
Manual for maintenance of multi-host ixodid ticks in the laboratory journal September 2016
Babesia microti: Prolonged survival of salivarian piroplasms in nymphal Ixodes dammini journal December 1987
Development of Babesia microti sporozoites in adult Ixodes dammini journal August 1986
Natural prevalence of infection with Ehrlichia (Cytoecetes) phagocytophila of Ixodes ricinus ticks in Scotland journal August 1998
Risk of Infection with Borrelia burgdorferi sense lato for a Host in Relation to the Duration of Nymphal Ixodes ricinus Feeding and the Method of Tick Removal journal January 1998
Tick-borne ehrlichioses journal April 2001
Transmission of Borrelia miyamotoi sensu lato relapsing fever group spirochetes in relation to duration of attachment by Ixodes scapularis nymphs journal August 2017
Pathogen transmission in relation to duration of attachment by Ixodes scapularis ticks journal March 2018
Studies in Tick-borne Fever of Sheep. I. Transmission by the Tick, Ixodes ricinus, with a Description of the Disease Produced journal April 1933
Studies in Tick-borne Fever of Sheep journal July 1936
Field evidence that roe deer (Capreolus capreolus) are a natural host for Ehrlichia phagocytophila journal April 2000
Perpetuation of the agent of human granulocytic ehrlichiosis in a deer tick-rodent cycle. journal June 1996
An Ixodes scapularis protein required for survival of Anaplasma phagocytophilum in tick salivary glands journal May 2006
Effect of Tick Removal on Transmission ofBorrelia burgdorferiandEhrlichia phagocytophilabyIxodes scapularisNymphs journal March 2001
Granulocytic Ehrlichiosis in the Laboratory Mouse journal March 1998
Duration of Tick Attachment Required for Transmission of Granulocytic Ehrlichiosis
  • Katavolos, Paula; Armstrong, Philip M.; Dawson, Jacqueline E.
  • The Journal of Infectious Diseases, Vol. 177, Issue 5 https://doi.org/10.1086/517829
journal May 1998
Investigations on the Mode and Dynamics of Transmission and Infectivity of Borrelia burgdorferi Sensu Stricto and Borrelia afzelii in Ixodes ricinus Ticks journal March 2002
Acquisition of Different Isolates of Anaplasma phagocytophilum by Ixodes scapularis from a Model Animal journal March 2004
Transmission Route Efficacy and Kinetics of AnaplasmaphagocytophilumInfection in the White-Footed Mouse,Peromyscus leucopus journal December 2004
Duration of Adult Female Ixodes dammini Attachment and Transmission of Borrelia burgdorferi, with Description of a Needle Aspiration Isolation Method journal April 1991
Transmission of the Lyme Disease Spirochete Borrelia mayonii in Relation to Duration of Attachment by Nymphal Ixodes scapularis (Acari: Ixodidae) journal July 2017
Life Cycles of Seven Ixodid Tick Species (Acari: Ixodidae) Under Standardized Laboratory Conditions journal September 2007
Anaplasma phagocytophilum Dense-Cored Organisms Mediate Cellular Adherence through Recognition of Human P-Selectin Glycoprotein Ligand 1 journal July 2009
Proteomic Analysis of Anaplasma phagocytophilum during Infection of Human Myeloid Cells Identifies a Protein That Is Pronouncedly Upregulated on the Infectious Dense-Cored Cell journal August 2011
Granulocytic Ehrlichiosis in Tick-Immune Guinea Pigs journal April 1998
Postgenomic Analyses Reveal Development of Infectious Anaplasma phagocytophilum during Transmission from Ticks to Mice journal March 2012
Acquisition and Transmission of the Agent of Human Granulocytic Ehrlichiosis by Ixodes scapularis Ticks journal December 1998
Serologic Evidence of Infection with Ehrlichia spp. in Wild Rodents (Muridae: Sigmodontinae) in the United States journal March 1998
Duration of tick attachment and Borrelia burgdorferi transmission journal March 1987
Transmission of Anaplasma phagocytophilum (Foggie, 1949) by Ixodes ricinus (Linnaeus, 1758) ticks feeding on dogs and artificial membranes journal March 2019
Tick-borne pathogen detection in midgut and salivary glands of adult Ixodes ricinus journal April 2019
Identification and Characterization of Anaplasma phagocytophilum Proteins Involved in Infection of the Tick Vector, Ixodes scapularis journal September 2015
Borrelia burgdorferi (Lyme Disease) journal December 2014
Effects ofAnaplasma phagocytophilumInfection on the Molting Success ofIxodes scapularis(Acari: Ixodidae) Larvae journal May 2004
Genetic Variants ofEhrlichia phagocytophila1,Rhode Island and Connecticut journal May 2002
Anaplasma phagocytophilum –infected Ticks, Japan journal November 2005
Human Babesiosis on Nantucket Island: Prevalence of Babesia microti in Ticks * journal September 1980
Short Report: Duration of tick Attachment Required for Transmission of Powassan Virus by deer Ticks journal September 2004