Journal of Medical Entomology (J MED ENTOMOL )

Publisher: Bernice Pauahi Bishop Museum. Dept. of Entomology, Entomological Society of America


Journal of Medical Entomology is published bimonthly in January, March, May, July, September, and November. The editorial board comprises one representative each from Sections A, B, C, E, and F and five representatives from section D. The journal currently has three coeditors. The journal publishes reports on all phases of medical entomology and medical acarology, including the systematics and biology of insects, acarines, and other arthropods of public health and veterinary significance. In addition to full-length research articles, the journal publishes Book Review, Forum, Short Communications and Rapid Communications. Published by the Entomological Society of America.

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    Journal of medical entomology
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Entomological Society of America

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    • Set statement to accompany article, 'This article is the copyright property of the Entomological Society of America and may not be used for any commercial or other private purpose without specific written permission of the Entomological Society of America'
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Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Paederus beetles are cosmopolitan medically important insects that cause dermatitis linearis to humans. In Brazil, even though the medical importance of these beetles, no studies focusing directly on the abundance and ecological features of harmful species exist. Therefore, this study aims at determining the abundance and the nocturnal hourly dispersal of Paederus species attracted to fluorescent, incandescent and black light sources in the Brazilian savanna. Paederus species were captured from May to September for three consecutive years, between 2011 and 2013. The specimens were caught hourly, from 18:00 to 06:00. Paederus beetles were attracted to incandescent, fluorescent and black light lamps as light sources. A total of 959 individuals of five species was collected. The collected species were P. protensus (59.85%), P. columbinus (29.20), P. mutans (7.09), P. brasiliensis (3.34) and P. ferus (0.52). The black light was the most attractive source and the darkest collecting point was the most representative for the number of individuals. The lowest catches were captured at full moon and the highest catches were between 2200 and 0100 h. Future investigations are needed to better understand the role of night temperature and soil humidity affecting the seasonal growth of Paederus beetle populations of northeastern Brazil.
    Journal of Medical Entomology 01/2015; 52(1):50-55.
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    ABSTRACT: Mosquito–microbe interactions tend to influence larval nutrition, immunity, and development, as well as fitness and vectorial capacity of adults. Understanding the role of different bacterial species not only improves our knowledge of the physiological and ecological consequences of these interactions, but also provides the basis for developing novel strategies for controlling mosquito-borne diseases. We used culture-dependent and culture-independent techniques to characterize the bacterial composition and abundance in water and midgut samples of larval and adult females of Aedes japonicus (Theobald), Aedes triseriatus (Say), and Culex restuans (Theobald) collected from waste tires at two wooded study sites in Urbana, IL. The phylum-specific real-time quantitative polymerase chain reaction assay revealed a higher proportion of Actinobacteria and a lower proportion of gamma-Proteobacteria and Bacteroidetes in water samples and larval midguts compared to adult female midguts. Only 15 of the 57 bacterial species isolated in this study occurred in both study sites. The number of bacterial species was highest in water samples (28 species from Trelease Woods; 25 species from South Farms), intermediate in larval midguts (13 species from Ae. japonicus; 12 species from Ae. triseriatus; 8 species from Cx. restuans), and lowest in adult female midguts (2 species from Ae. japonicus; 3 species from Ae. triseriatus). These findings suggest that the composition and richness of bacterial communities varies both between habitats and among mosquito species and that the reduction in bacteria diversity during metamorphosis is more evident among bacteria detected using the culture-dependent method.
    Journal of Medical Entomology 01/2015; 52(1):63-75.
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    ABSTRACT: Surveillance of malaria vectors in Africa is most often accomplished using CDC-type light traps or human landing catches (HLCs). Over the past 30 yr, a variety of commercial and experimental mosquito traps have been developed for residential mosquito control or for improved surveillance of disease vector species, including the BG Sentinel (BGS) trap. To optimize collection of Anopheles gambiae Giles using this trap, BGS traps were modified with an opening (vent) added to the trap base to decrease exhaust airflow. Four traps configurations were tested with colony-reared host-seeking female An. gambiae in free-flying laboratory enclosures. Six attractant treatments (three attractants: BG-Lure, Limburger cheese, and a blank, with and without CO2) were tested concurrently. Across all trap‐attractant combinations, significantly more mosquitoes (P 2 and Limburger Cheese + CO2 bait combinations were more attractive than the other attractants tested alone. All attractant combinations collected significantly more mosquitoes than unbaited traps. Field studies are needed to determine if BG-Lure + CO2- or Limburger cheese + CO2-baited BGS traps are comparable with HLCs in collecting host-seeking An. gambiae.
    Journal of Medical Entomology 11/2014; 51(6).
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    ABSTRACT: A study to evaluate the protection provided by permethrin-treated fabric following cold-water washing against biting by mosquitoes is reported. Australian Defense Force (ADF) disruptive pattern combat uniform (DPCU) shirt fabric and entire shirts were treated by dipping in a 0.6% emulsion (Perigen Defense, containing 500 g/liter permethrin), and commercial factory treatment in the United States (Factory A) and Europe (Factory B). Protection was recorded after 1, 3, 5, 10, 30, and 50 washes. The treated fabric provided 100% protection against bites of Anopheles farauti Laveran for at least 50 washes, although only 4.8‐19.0% of this species fed through untreated DPCU. The protection provided by each type of permethrin treatment against Aedes aegypti (L.) biting was variable; however, there were no significant differences between the percentage of mosquitoes biting between 1 and 10 washes. A comparison between the two factory treatments for 1‐50 washes also showed no statistical difference in Ae. aegypti feeding. Chemical analysis of fabric was conducted using gas chromatography and showed that the initial dose was 0.125 mg/cm2 for Perigen-treated fabric, which fell to 0.004 mg/cm2 after 10 washes. By contrast, factory treatments resulted in initial dose rates of 0.20 mg/cm2 for Factory A and 0.19 mg/cm2 for Factory B. After 10 washes, Factory A-treated fabric had 0.09 mg/cm2 and Factory B 0.15 mg/cm2 of permethrin. Despite the higher concentrations of permethrin in the fabric, there was not a commensurate increase in biting protection provided by the factory-treated fabric, compared with fabric treated by dipping in permethrin emulsion.
    Journal of Medical Entomology 11/2014; 51(6).
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    ABSTRACT: House flies, Musca domestica L., and stable flies, Stomoxys calcitrans (L.), (Diptera: Muscidae), common pests on equine facilities, were studied in the laboratory to determine the success and duration of larval development and oviposition preferences on six substrates commonly found on equine facilities. Substrates tested were hay soiled with urine and manure, fresh horse manure, pine shaving bedding soiled with urine and manure (72 h in a manure pile), builders sand bedding soiled with urine and manure aged 3 d, and soil from an overgrazed pasture mixed with urine and manure of variable age. House fly larvae failed to develop into adults in hay, soil, and sand substrates. Stable flies preferred to oviposit on substrates with plant material and not on fresh manure. However, when eggs were added to the substrates, pupariation was maximal in fresh manure and the fresh pine shaving substrate. Stable flies developed in all six equine substrates, but development was less successful on the substrates with soil. In choice tests, fresh manure and the fresh pine shaving substrates were the most attractive for house fly oviposition. These substrates also yielded the greatest number of house fly puparia from artificially added eggs. An understanding of oviposition preferences and differential larval development of house flies and stable flies on these substrates may help develop options for reducing pest populations by effectively managing equine waste and selecting appropriate bedding materials.
    Journal of Medical Entomology 11/2014; 51(6).
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    ABSTRACT: The polar lipids on the surface of the Old World sand fly, Phlebotomus papatasi (Scopoli), were analyzed by high-resolution mass spectrometry. Blood-fed females and nonblood-fed females and males were separately analyzed and compared. The major polar lipids were found to be long-chain diols and fatty acids. Relatively high levels of diacylglycerols were found in blood-fed females and in males. A wide variety of lipids were found at low levels, including esters, sterols, monoacylglycerols, and hydroxy fatty acids. Blood-fed females had several lyso lipids and N-acyl amino acids that were not found on unfed females or males. These substances may be surfactants used in blood feeding. Heneicosenoic acid was found on females at more than twice the level of males, suggesting it could be a component of a female pheromone. Four substances were identified on males at twofold higher levels than on females: tetradienoic acid, methoxyhexadecasphinganine, butyl octadecanoate, and diacylglycerol(14:1/12:0/0:0). These could be short-range pheromones involved in courtship, and they will be further analyzed in future behavioral bioassays.
    Journal of Medical Entomology 11/2014; 51(6).
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    ABSTRACT: Blow fly members of the family Calliphoridae, specifically Lucilia sericata (Meigen), have application in the fields of behavioral ecology, forensics, and medicine as agents for assessing ecological succession or decomposition and postmortem interval estimation, and for maggot debridement therapy, respectively. The lack of standardization of laboratory adult insect feeding, breeding, and rearing protocols among researchers in behavioral, medical, and forensic fields has become problematic. With the goal of understanding physical and physiological effects of diet as a baseline for future behavioral experiments, this article focuses on determining basic culture requirements for the adult blow fly L. sericata by comparing nine diets and the effects of each on survivorship and fecundity under controlled laboratory conditions. Percent survival, fecundity, and the effect of culture density were analyzed over the course of 120 d. Results indicate that a simple broad spectrum diet of honey water and bovine liver is the optimum diet for extending the life span of the flies and increasing the number of eggs laid per female per oviposition event, with 5‐20 female flies being the optimum number per culture vessel. This culture protocol is simple to follow, can be easily incorporated into current behavioral, forensic, and medical entomology research programs, and the dietary components are readily available across diverse geographic areas.
    Journal of Medical Entomology 11/2014; 51(6).
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    ABSTRACT: Spiders found in international cargo brought into North America are sometimes submitted to arachnologists for identification. Often, these spiders are presumed to be of medical importance because of size or a submitter's familiarity with a toxic spider genus from the continent of origin. Starting in 2006, requests were made for spiders found in international cargo brought into North America, in addition to the specimens from similar cargo shipments already in our museum collections. This was an ad hoc study that allowed us to focus on spiders of concern to the discoverer. We identified 135 spiders found in international cargo. A key for the most common species is provided. The most frequently submitted spiders were the pantropical huntsman spider, Heteropoda venatoria (L.) (Sparassidae), and the redfaced banana spider, Cupiennius chiapanensis Medina Soriano (Ctenidae). Spiders of medical importance were rare. The most common cargo from which spiders were submitted was bananas with most specimens coming from Central America, Ecuador, or Colombia. Lack of experience with nonnative fauna caused several experienced American arachnologists to misidentify harmless ctenid spiders (C. chiapanensis, spotlegged banana spider, Cupiennius getazi Simon) as highly toxic Phoneutria spiders. These misidentifications could have led to costly, unwarranted prophylactic eradication measures, unnecessary employee health education, heightened employee anxiety and spoilage when perishable goods are left unloaded due to safety concerns.
    Journal of Medical Entomology 11/2014; 51(6).
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    ABSTRACT: While parasitic lice (Insecta: Phthiraptera) have historically been an important model taxon for understanding host‐parasite coevolution, very few molecular markers have been developed for phylogenetic analysis. The current markers are insufficient to resolve many of the deeper nodes in this group; therefore, sequences from additional genetic loci are necessary. Here, we design primers targeting several nuclear protein coding genes based on a complete genome and transcriptome of Pediculus humanus L. plus transcriptomes and modest coverage genomic data from five genera of avian feather lice. These primers were tested on 32 genera of avian feather lice (Ischnocera), including multiple species within some genera. All of the new primer combinations produced sequences for the majority of the genera and had similar or higher divergences than the most widely used nuclear protein-coding gene in lice, EF-1α. These results indicate that these new loci will be useful in resolving phylogenetic relationships among parasitic lice.
    Journal of Medical Entomology 11/2014; 51(6).
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    ABSTRACT: The objective of this study was to compare the behavioral responses (contact irritancy and noncontact spatial repellency) between susceptible and resistant populations of Aedes aegypti (L.) (=Stegomyia aegypti) to essential oils, citronella, and eucalyptus, Eucalyptus globulus, extracts, using an excito-repellency test system. N, N-diethyl-meta-toluamide (DEET) was used as the standard reference repellent. Mosquitoes included two long-standing insecticide susceptible colonies (U.S. Department of Agriculture and Bora Bora) and two pyrethroid-resistant populations recently obtained from Phetchabun and Kanchanaburi provinces in Thailand. Both DEET and citronella produced a much stronger excitation (“irritancy”) and more rapid flight escape response in both pyrethroid-resistant populations compared with the laboratory populations. Noncontact repellency was also greater in the two resistant populations. Eucalyptus oil was found to be the least effective compound tested. Differences in responses between long-established pyrethroid-susceptible colonies and newly established and naturally resistant colonies were clearly demonstrated. These findings also demonstrate the need for further comparisons using natural pyrethroid-susceptible populations for elucidation of factors that might contribute to different patterns of escape behavior.
    Journal of Medical Entomology 11/2014; 51(6).
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    ABSTRACT: Ambient temperature can influence tick development time, and can potentially affect tick interactions with pathogens and with vertebrate hosts. We studied the effect of ambient temperature on duration of attachment of larval blacklegged ticks, Ixodes scapularis Say, to eastern fence lizards, Sceloporus undulatus (Bosc & Daudin). Feeding periods of larvae that attached to lizards under preferred temperature conditions for the lizards (WARM treatment: temperatures averaged 36.6°C at the top of the cage and 25.8°C at the bottom, allowing behavioral thermoregulation) were shorter than for larvae on lizards held under cool conditions (COOL treatment temperatures averaged 28.4°C at top of cage and 24.9°C at the bottom). The lizards were infested with larvae four times at roughly monthly intervals. Larval numbers successfully engorging and dropping declined and feeding period was longer after the first infestation.
    Journal of Medical Entomology 11/2014; 51(6).
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    ABSTRACT: Ross River virus (RRV) disease is the most common and widespread mosquito-borne disease in Australia, resulting in considerable health and economic cost to communities. While naturally occurring nontidal flood events may enhance mosquito abundance, little is known about the impact of such events on RRV transmission. This article critically reviews the existing evidence for an association between naturally occurring nontidal flood events and RRV transmission. A systematic literature search was conducted on RRV transmission related to flooding and inundation from rain and riverine overflow. Overall, the evidence to support a positive association between flooding and RRV outbreaks is largely circumstantial, with the literature mostly reporting only coincidental occurrence between the two. However, for the Murray River, river flow and height (surrogates of flooding) were positively and significantly associated with RRV transmission. The association between nontidal flooding and RRV transmission has not been studied comprehensively. More frequent flood events arising from climate change may result in increased outbreaks of RRV disease. Understanding the link between flood events and RRV transmission is necessary if resources for mosquito spraying and public health warnings are to be used more effectively and efficiently.
    Journal of Medical Entomology 11/2014; 51(6).