Tick-borne disease in birds, Sarah Hamer: Interested in building a compartmental model for ticks (larvae, nymphs, adults, on/off hosts, infected/uninfected) -- mostly interested in conceptual model for asking various questions. Mostly interested in B. burgdorferi. Data sets from mist netting in Chicago & SW Michigan -- presence/absence of ticks, infection. Michigan sites: 20K birds over 5 years, <10% with ticks, ~3% infected. Complementary data sets from Chicago (~ 6K birds). Crude age, spring/fall migrant, resident.
West Nile virus, Marm Kilpatrick: mosquitoes and birds. M abundance: 9 sites, May-October, 8-9 years (about 35K mosquitoes, 4-5K birds/year). M. feeding patterns, infection prevalence of mosquitoes. Bird data: bird abundance, seroprevalence. Major question: effect of land-use cover on m. & b. communities, how does that affect transmission rates? Relative contributions of changes of community etc. changes on transmissions -- mechanistic components. Land use: forest cover, impermeable surface.
Effects of rodent and plant communities on Bartonella, Randi: 96 field sites from Kenya (agr/pastoral/conserved), exp exclosures; rodent samples (22 species, 5 strains of Bartonella), detailed info on plant communities & structure. Also spread across soil + rainfall gradient. Connect rodent, plant communities to dynamics + prevalence of Bartonella. Data collected over 2 years. Tick/mite/lice flea burdens.
Chytrid in midwife toads, Jessica: short time series; 1 year of chytrid in amphibians (midwife toad tadpoles); [every month]. Prevalence & abundance; 6 sites (watering troughs -- different veg, surrounding environment), also temperature measurements every 30 minutes. Variation through time of temperature. Categorical measurements of host density.
Brucellosis in reindeer, Sophie: 5 years of demography (closed population). Different brucellosis tests (2, 4-5 in different years), GPS coordinates, herder names. 65, 99 sampled for brucellosis [seroprevalence] -- also sex, age. Two regions, different social systems of herder -- disease transmission may differ. Predict, estimate prevalence, persistence, transmission. 800 in population.
Mycobacterium paratuberculosis in dairy cattle, Becky Mitchell: 7-year long data sets on 3 data herds (100, 400, 150 indiv.). How is Mp moving between animals? Know when animals begin to be infectious, tissue samples. ~ 45% positive at slaughter. Immune status every 3 months (responsive vs nonresponsive). Short-sequence repeat strain types for positive samples. Can we identify transmission routes? Have location (at birth & first calving) and contact-network data -- look at effect of exposure on positive-at-slaughter. Lots of strains (14+), 2 dominant strains -- but lots of unknowns. 6K samples, 150 positives; individual farms, 4K/60 positive
Worms in white-footed mice, Kurt Vandegrift: Capture-recapture data. Experimental deworming of 12/24 populations (since 2000; experiment last April). Boom & bust cycles. 12000 animals; reproductive status, survival, sex, capture location. Effect of parasites on cycle. Also fecal egg counts. Animals have differential status (treated, sham). Want to know survival etc ... NY, elsewhere.
Viruses in grasses, Amy ... : 3 sites, CA. Different scales on which env factors control prevalence. N*P factorial experiment, veg community (annual/perennial etc.); 5 species of virus, 3 tested in year 1, 5 in year 2. Approximate coordinates -- some spatial correlations. More spatial stats? Low coinfection. 3000 individuals, 20% positive.
Within-host data in mouse malaria, Nina: Single infection of drug-resistant strain, varying resource levels; 4 groups co-infection -- does advantage of drug resistance vary according to resource level? (Change competitive suppression). 1 group died; time series; parasite density of each strain daily (days 3-21); mouse weight & RBC . 40 mice total -- little genetic variation.
Tick-borne disease in Peromyscus, Evie: 2 tick spp, 3 spp from env trapping); interaction on infection + prevalence. Within-host mechanisms (immunity etc.). 2011 field data; 2 sites x 5 May-Sep. Individual hosts marked; tick load, innate immunity, sex, reprod condition. Tick densities in env, temp & RH on trapping grids. What aspects of host influence tick burden over time? Prob(capture) -> tick burden? Env conditions -> tick densities? No coinfection, but immune function. 117 hosts, 50% recaptured 1+ times. 600 ticks from hosts, 1000s through dragging. General immune function. Pathogens: Bartonella & rickettsia (Borellia probably there
Pasteuria ramosa in Seriodaphna, Dylan: 7-month (weekly sampling) community data set, NE Georgia; zooplankton & P ramosa in Seriodaphnia. Env data (temp, DO, conductance). 11 species/groups. Growth rates, Shannon indices. Does diversity control epidemic timing? (sharp epidemic peak -- 1% cutoff for when epidemic is present). Correlations: sig negative correlation between prevalence & host density 1 week later. (10-14 day mortality or castration). Two small species competing for resources -- negative correlation. (Looking for dilution effect). Live counts -- 400+ animals, prevalence
Trematodes in snails and frogs, John: Trematode (echinostomes); 30 ponds, snail host (1st intermed.) and green frogs (# parasites/animal). Env factors (pond size, shade, cover, water chemistry, densities of snail & predators). 1xmonth for 4 months, 4 years; amphib July/August x 2 years.
Human malaria in Colombia, Alejandro: Case reports by county, 7 years (by week, by municipality). 2 years of more detailed data -- each case reported individually, household survey (social factors). Case study in one population (indigenous Amazonian pop) -- behav ecology data -- social network analysis etc. Effect of ethnicity, behavioral components on incidence. 44K cases matched to household surveys -- 1/3 of data set. More detailed data (all reports) for 1 department (5 years).