AMPHIBIAN CHYTRIDIOMYCOSISGEOGRAPHIC DISTRIBUTION<strong>Herpetological</strong> <strong>Review</strong>, 2008, 39(2), 192–193.© 2008 by Society for the Study of Amphibians and ReptilesAmphibian Chytridiomycosis in CaptiveAcris crepitans blanchardi (Blanchard’s CricketFrog) Collected from Ohio, Missouri, andMichigan, USAKEVIN C. ZIPPELDetroit Zoo, Royal Oak, Michigan 48068, USACurrent address: Amphibian Ark, 12101 Johnny Cake Ridge RoadApple Valley, Minnesota 55124, USAe-mail: KevinZ@AmphibianArk.organdCHRIS TABAKADetroit Zoo, Royal Oak, Michigan 48068, USACurrent address: Binder Park Zoo, 7400 Division DriveBattle Creek, Michigan 49014, USAe-mail: tortvet@gmail.comAmphibian chytridiomycosis, a disease caused by the fungusBatrachochytrium dendrobatidis (Bd), has been documented innumerous wild populations in North America (Ouellet et al. 2005),including an Illinois population of Blanchard’s Cricket Frog (Acriscrepitans blanchardi) (Pessier et al. 1999). Herein we documentthe possible occurrence of Bd in this species in Ohio in 1999 andthe likely occurrence of Bd in populations from Missouri in 2001and Michigan in 2004.On 16 September 1999, 10 Blanchard’s Cricket Frogs were collectedat St. Mary’s Fish Hatchery in Auglaize County, Ohio, andtransferred to the Toledo Zoo where they spent 10 days in isolationbefore being sent to the Detroit Zoo, Michigan. By 20 September2000, eight frogs had been moved from their quarantineenclosure to a native-Michigan, mixed-species amphibian exhibit.The other two frogs were missing from their quarantine enclosureand presumed dead; it is not unusual for small amphibians to decomposecompletely before their death has been detected, particularlyin naturalistic enclosures. The first two confirmed deathswere over a year after their arrival in Detroit and within months oftheir addition to the mixed exhibit (10 December 2000, 7 February2001); these two frogs tested positive histologically for Bd. Asthe Bd treatment protocol had only recently been published(Nichols and Lamirande 2000) and was not yet known by zoostaff, nothing was done for the animals remaining in the exhibit.Three more frogs died between 27 February 2001 and 10 July2003: histopathology results were inconclusive for two, and Bdwas not detected histologically in the third. Two additional frogswere missing and presumed dead at that time also. On 30 March2003, an American Toad (Anaxyrus americanus) in that exhibitdied; this animal tested positive histologically for Bd. Medicationwith the established protocol (Nichols and Lamirande 2000) wasbegun for the other amphibians in that enclosure in late July 2003.The last cricket frog died on 22 July 2003 while under treatmentfor Bd; there was no histologic evidence of active Bd infection,but there was mild multifocal epidermal hyperplasia likely fromprevious Bd infection. There are two scenarios that could explainthe presence of Bd in this group of cricket frogs from Ohio. Thewild population could be infected and these frogs could have enteredthe collection asymptomatically carrying Bd and graduallysuccumbed over nearly four years. Although some species susceptibleto Bd tend to die within a few weeks of infection, otherscan carry light infections of the disease with no clinical symptomsand only succumb under duress. In this case, the last cricket frogsurvived over two and half years after the first Bd-positive deathin the enclosure. The other possibility is that, since the two positivecases were not detected until after the group was moved intothe mixed-species exhibit, the cricket frogs could have been infectedby the other amphibians in that exhibit, which could havebeen asymptomatic. Two of the three other taxa (Anaxyrusamericanus, Notophthalmus viridescens, but not Lithobatespipiens) eventually tested positive.On 22 October 2001, 10 Blanchard’s Cricket Frogs were collectedfrom Franklin County, Missouri, and transferred to the DetroitZoo. All were dead within four months. Four frogs died inquarantine throughout December 2001; histopathology results wereinconclusive. The remaining six frogs were moved on 2 January2002 into a general holding room with other species but weremaintained in isolation in their own enclosure. Two more frogswere dead by 10 January 2002; histopathology results on thesefrogs were also inconclusive. The seventh frog died on 29 January2002; this frog tested positive histologically for Bd. The remainingthree frogs were dead by 18 February 2002 before we learnedthe results from the seventh frog and had a chance to medicatethem using the established protocol; histopathology results wereinconclusive. The Bd in these animals could have come from poorhusbandry (transmission from other isolated asymptomatic animals),but because these frogs were in an isolated enclosure withdedicated tools during their entire time in captivity, more likelythey came infected from the wild.From 4 August through 7 October 2004, 835 Blanchard’s CricketFrog adults and 176 tadpoles were collected from a wetland inYpsilanti, Washtenaw County, Michigan, where their native habitatwas slated for development. These frogs were held temporarilyin isolated quarantine at the Detroit Zoo, then released into threenewly constructed local wetland sites from 24 August to 7 October2004 (Rickard et al. 2004). Histopathology results from threefrogs and four tadpoles collected and sacrificed a month prior totranslocation revealed no Bd or other diseases. While they were incaptivity, 181 frogs died. Of those, eight were submitted for histopathologyand the last two tested positive for Bd. Because theseanimals were kept in isolated quarantine in a new building withno other amphibians, it is likely that they came infected from thewild.In all three cases, there is a possibility that the Bd in the captivecricket frogs originated from other animals in the captive collection.However, we feel that this is rather unlikely, at least in thetwo cases where the animals were kept isolated from others in thecollection. In the future, we recommend testing for Bd in all amphibiansarriving into captive collections. Not only will this benefitthe health of the captive collection, it can also provide valuabledata on the distribution of Bd in the wild. Bd is not somethingmost zoos test for in quarantine, although a simple PCR test isnow available (Annis et al. 2004) and might someday be afford-192 <strong>Herpetological</strong> <strong>Review</strong> 39(2), 2008
able for such routine testing. Sampling a subset of the animals ischeaper, but as in the case of the cricket frogs from Michigan, itcan lead to oversight.LITERATURE CITEDANNIS, S. L., F. DASTOOR, H. ZIEL, P. DASZAK, AND J. E. LONGCORE. 2004. ADNA-based assay identifies Batrachochytrium dendrobatidis in amphibians.J. Wildl. Dis. 40:420–428.NICHOLS, D., AND E. W. LAMIRANDE. 2000. Treatment of cutaneouschytridiomycosis in blue-and-yellow poison dart frogs (Dendrobatestinctorius). In More and Speare [eds.], Proceedings: Getting the Jumpon Amphibian Disease, p. 51. Rainforest CRC, Cairns, Australia.OUELLET, M., I. MIKAELIAN, B. D. PAULI, J. RODRIGUE, AND D. M. GREEN.2005. Historical evidence of widespread chytrid infection in NorthAmerican amphibian populations. Conserv. Biol.19:1431–1440.PESSIER, A. P., D. K. NICHOLS, J. E. LONGCORE, AND M. S. FULLER. 1999.Cutaneous chytridiomycosis in poison dart frogs (Dendrobates spp.)and White’s tree frogs (Litoria caerulea). J. Vet. Diag. Invest. 11:194–199.RICKARD, A., E. SONNTAG, AND K. ZIPPEL. 2004. Amphibian conservationstrategies: Translocating an entire population of Blanchard’s cricketfrog (Acris crepitans blanchardi) in southeast Michigan. The EndangeredSpecies UPDATE 21:128–131.<strong>Herpetological</strong> <strong>Review</strong>, 2008, 39(2), 193–196© 2008 by Society for the Study of Amphibians and ReptilesOccurrence of the Amphibian PathogenBatrachochytrium dendrobatidis in Blanchard’sCricket Frog (Acris crepitans blanchardi) in theU.S. Midwestand Skinner 2006; Mierzwa 1998; Mossman et al. 1998). A numberof hypotheses have been proposed to account for the asymmetricdecline of Blanchard’s Cricket Frog including: habitat lossand fragmentation, drought and climate change, contaminants,competition and/or predation by fish or other amphibians, andchanges in local and regional successional patterns (Beasley et al.2005; Gray and Brown 2005; Hammerson and Livo 1999; Hay1998; Irwin 2005; Jung 1993; Lannoo 1998; Lehtinen 2002;Lehtinen and Skinner 2006; Reeder et al. 2005; Russell et al. 2002).The potential involvement of B. dendrobatidis in the decline ofthis species is clearly another hypothesis in need of investigation.Here we report on tests for the presence of B. dendrobatidis inBlanchard’s Cricket Frog.Methods.—Skin swabs or tissue samples from 205 Blanchard’sCricket Frogs were collected from 21 haphazardly chosen pondsin six states in the midwestern United States (Fig. 1). Most samples(N = 197) were collected between June and October of 2006 fromlive frogs in the field. A small number of samples (N = 8) camefrom venter skin sections of alcohol-preserved museum specimenscollected in April 2002 and June 2003. Most samples were fromjuveniles or adults but a small number of larvae were also sampled.Skin swabs were obtained by running a sterile cotton swab alongthe skin of the captured frog for approximately 30 seconds, focusingon the hands, feet and pelvic region. For larvae, swabbing wasconcentrated around the oral apparatus. Tissue samples were eithertoe clips or skin sections. Toe clips were removed from livefrogs using sharp, sterilized scissors. Both skin swabs and tissuesamples were preserved in 70% ethanol in 2.0 ml screw-cappedmicrocentrifuge tubes. In a few cases, voucher specimens wereretained for reference purposes (deposited at the Illinois NaturalHistory Survey and the James Ford Bell Museum of Natural History),otherwise frogs were released at the site of capture. AllSHELDON L. STEINERandRICHARD M. LEHTINEN*The College of Wooster, Department of Biology931 College Mall, Wooster, Ohio, 44691 USAcorresponding author e-mail: rlehtinen@wooster.eduBatrachochytrium dendrobatidis is a chytrid fungal pathogenof amphibians that has been implicated in a number of amphibiandeclines (Berger et al. 1998; Lips et al. 2006). However, despitethe importance of B. dendrobatidis as a potential causative agentof population declines and biodiversity loss in amphibians, manyquestions remain regarding this pathogen and its impact. Mostimportantly, we still have relatively few data on which species areinfected by B. dendrobatidis, if infection is commonly associatedwith declines, and the geographic scope of its occurrence. Even inNorth America, where the amphibian fauna is relatively wellknown,only a small number of studies have examined infectionand distribution patterns of B. dendrobatidis.Blanchard’s Cricket Frog (Acris crepitans blanchardi) is a smallNorth American hylid that was formerly one of the most commonfrogs in North America (Gray et al. 2005). Recently, serious declineshave been reported in Blanchard’s Cricket Frog populationsthroughout much of the midwestern United States, particularlythe northern and western parts of its range (Brodman and Kilmurry1998; Hay 1998; Lannoo et al. 1994; Lehtinen 2002; LehtinenFIG. 1. Geographic distribution of sites where Blanchard’s Cricket Frogswere sampled in the U.S. Midwest. Filled dots indicate sites where B.dendrobatidis was detected with the PCR assay. U.S. States: IL = Illiniois;IN = Indiana; IA = Iowa; KS = Kansas; MI = Michigan; MO = Missouri;OH = Ohio; OK = Oklahoma.<strong>Herpetological</strong> <strong>Review</strong> 39(2), 2008 193
- Page 1 and 2:
HerpetologicalReviewVolume 39, Numb
- Page 3 and 4:
About Our Cover: Zonosaurus maramai
- Page 5 and 6:
Prey-specific Predatory Behavior in
- Page 7 and 8:
acid water treatment than in the co
- Page 10 and 11:
TABLE 1. Time-line history of croco
- Page 12 and 13:
The Reptile House at the Bronx Zoo
- Page 14 and 15:
FIG. 6. A 3.9 m (12' 11 1 / 2") Ame
- Page 16 and 17: One of the earliest studies of croc
- Page 18 and 19: TABLE 2. Dimensions and water depth
- Page 20 and 21: we call it, is in flux.Forty years
- Page 22 and 23: Feb. 20-25. abstract.------. 1979.
- Page 24 and 25: yond current practices (Clarke 1972
- Page 26 and 27: poles (Pond 1 > 10,000, Pond 2 4,87
- Page 28 and 29: ------, R. MATHEWS, AND R. KINGSING
- Page 30 and 31: Herpetological Review, 2008, 39(2),
- Page 32 and 33: TABLE 2. Summary of running (includ
- Page 34 and 35: FIG. 2. Responses of adult Regal Ho
- Page 36 and 37: PIANKA, E. R., AND W. S. PARKER. 19
- Page 38 and 39: BUSTAMANTE, M. R. 2005. La cecilia
- Page 40 and 41: Fig. 3. Mean clutch size (number of
- Page 42 and 43: facilitated work in Thailand. I tha
- Page 44 and 45: preocular are not fused. The specim
- Page 46 and 47: FIG. 2A) Side view photo of Aechmea
- Page 48 and 49: 364.DUELLMAN, W. E. 1978. The biolo
- Page 50 and 51: incision, and placed one drop of Ba
- Page 52 and 53: 13 cm deep (e.g., Spea hammondii; M
- Page 54 and 55: FIG. 1. Medicine dropper (60 ml) wi
- Page 56 and 57: esearchers and Hellbenders, especia
- Page 58 and 59: FIG. 3. Relative success of traps p
- Page 60 and 61: data on Hellbender population struc
- Page 62 and 63: aits sometimes resulted in differen
- Page 64 and 65: trapping system seems to be a relat
- Page 68 and 69: TABLE 1. Prevalence of B. dendrobat
- Page 70 and 71: Conservation Status of United State
- Page 72 and 73: TABLE 1. Wood Frog (Rana sylvatica)
- Page 74 and 75: TABLE 1. Anurans that tested positi
- Page 76 and 77: is, on average, exposed to slightly
- Page 78 and 79: (10%) were dead but not obviously m
- Page 80 and 81: Submitted by CHRIS T. McALLISTER, D
- Page 82 and 83: FIG. 1. Oscillogram, spectrogram, a
- Page 84 and 85: FIG. 1. Adult Physalaemus cuvieri r
- Page 86 and 87: Répteis, Instituto Nacional de Pes
- Page 88 and 89: discovered 145 live hatchlings and
- Page 90 and 91: GRAPTEMYS GIBBONSI (Pascagoula Map
- Page 92 and 93: College, and the Joseph Moore Museu
- Page 94 and 95: FIG. 1. Common Ground Lizard (Ameiv
- Page 96 and 97: havior unavailable elsewhere. Here
- Page 98 and 99: 15% of predator mass, is typical fo
- Page 100 and 101: side the third burrow and began a f
- Page 102 and 103: We thank Arlington James and the st
- Page 104 and 105: mm) S. viridicornis in its mouth in
- Page 106 and 107: NECTURUS MACULOSUS (Common Mudpuppy
- Page 108 and 109: LITHOBATES CATESBEIANUS (American B
- Page 110 and 111: Research and Collections Center, 13
- Page 112 and 113: BRONCHOCELA VIETNAMENSIS (Vietnam L
- Page 114 and 115: Oficina Regional Guaymas, Guaymas,
- Page 116 and 117:
MICRURUS TENER (Texas Coralsnake).
- Page 118 and 119:
declining in this recently discover
- Page 120 and 121:
80.7372°W). 02 November 2005. Stev
- Page 122 and 123:
this effort, 7% of the 10 × 10 km
- Page 124 and 125:
the knowledge of the group. The aut
- Page 126 and 127:
which is listed under “Rhodin, A.
- Page 128 and 129:
noting that Sphenomorphus bignelli
- Page 130 and 131:
256 Herpetological Review 39(2), 20
- Page 132:
ISSN 0018-084XThe Official News-Jou