Poster Abstracts - S518



Articles

First molecular detection of pathogenic Leptospira in livestock from slaughterhouses in Madagascar


Identification: Rahelinirina, Soanandrasana

Credits: None available.

First molecular detection of pathogenic Leptospira in livestock from slaughterhouses in Madagascar
 
Soanandrasana Rahelinirina1, Mark Moseley2, Minoarisoa Rajerison1, Rakotoharinome Vincent Michel3, Sandra Telfer1,2
1Institut Pasteur de Madagascar, 2The University of Aberdeen, 3Direction des Services Vétérinaires Madagascar
 
Although leptospirosis has not been considered a significant health problem for humans or livestock in Madagascar, a recent serological study has shown evidence of exposure in humans and identified contact with cattle as a key risk factor.  However, the real role of livestock such as cattle and pig in the epidemiology of human leptospirosis in Madagascar remains to be elucidated. The aims of this study were to determine the prevalence of Leptospira among livestock in Madagascar and characterize the pathogenic Leptospira species found. Kidney and urine samples from 105 cattle and 100 pigs were collected from four slaughterhouses in Madagascar in 2015. The samples were tested by a quantitative real-time PCR TaqMan assay targeting the 16sRNA gene specific to pathogenic Leptospira. Where possible, sequencing of 200-300bp of the lfb1 gene was used to identify infecting Leptospira species. Cattle had a significantly higher overall prevalence than pigs (19% vs 5%). Cattle had 13 infections detected in kidney samples and 11 in urine samples, with only 4 individuals testing positive for both sample types. Of the positive pigs, only one infection was detected in kidney compared to four infections detected in urine.
Sequencing identified L. borgpetersenii and L. kirschneri in cattle. No lfb1 sequences were obtained from positive pig samples. This is the first molecular evidence of leptospirosis in livestock in Madagascar. The high prevalence in cattle provides further evidence that they could be an important source of infection for humans and also suggest that leptospirosis may have significant impacts on animal health and productivity. Moreover, our results highlight the need to consider sampling methodology when comparing studies and planning surveillance. Our results reinforce the need to take a one health approach for zoonoses like leptospirosis.
 


Can genomics enable genetic evaluations with phenotypes recorded on smallholder dairy farms?


Identification: Powell, Owen

Credits: None available.

Can genomics enable genetic evaluations with phenotypes recorded on smallholder dairy farms?
 
Owen Powell1, R. Chris Gaynor1, Janez Jenko1, Gregor Gorjanc1, Okeyo Mwai2, Raphael Mrode2,3 & John M. Hickey1
1The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Research Centre, Midlothian EH25 9RG, UK; 2ILRI, International Livestock Research Institute; 3Scotland's Rural College (SRUC), Peter Wilson Building, Kings Buildings, West Mains Road, Edinburgh, EH9 3JG
 
Background: Genetic evaluation is a central component of genetic improvement programs. In advanced economies, most genetic evaluations depend on large quantities of data that are recorded on commercial farms. Large herd sizes and widespread use of artificial insemination enable the genetic and environmental components of an individual animal's phenotype to be accurately separated. In contrast to this, herds are neither large nor have high genetic connectedness in smallholder farming systems, such as in East Africa. This limits genetic evaluation with pedigree information. Genomic information keeps track of shared haplotypes rather than animals. This information could capture and strengthen connectedness between herds and through this may enable genetic evaluations based on phenotypes recorded on smallholder dairy farms. The objective of this study was to use simulation to quantify the power of genomic information to enable genetic evaluation under such conditions.
 
Results: The results from this study show; (i) GBLUP produced higher accuracies than PBLUP at all population sizes and herd sizes, (ii) Models with herd fitted as a random effect produced equal or higher accuracies than the model with herd fitted as a fixed effect across all herd size scenarios, (iii) At low levels of genetic connectedness, with four offspring per sire and one to two animals per herd, GBLUP produced EBV accuracies greater than 0.5. Generally, a decrease in the number of sires mated per generation showed consistently higher accuracies compared to when more sires were used.
 
Conclusions: This study has demonstrated the potential of genomic information to be an enabling technology in smallholder dairy economies by facilitating genetic evaluations with records collected from farms with herd sizes of four cows or less.  The inclusion of smallholder dairy data in genetic evaluations could provide increases in local and national milk production, in regions such as East Africa, with downstream impacts upon wider societal, nutritional and economic outcomes.
 


Genomic Characterization of Zambian Indigenous Cattle Breeds


Identification: Smith, Edward

Credits: None available.

 
Genomic Characterization of Zambian Indigenous Cattle Breeds
 
Edward Smith
Virginia Polytechnic Institute and State University, Animal and Poultry Sciences, Blacksburg, VA
 
Breed characterization is a primary step in designing appropriate management and conservation programs of livestock in developing countries. Since cattle represent a major food animal species in Zambia, its conservation is a major goal for both the government and non-governmental organizations. To support the conservation effort, the objective of this thesis research was to assess the phenotypic and molecular characteristics of indigenous Zambian cattle breeds including Angoni, Barotse, Tonga, and Baila based on body measurements and randomly amplified polymorphic DNA (RAPD) markers, respectively. A total of 100 animals, 25 from each of the four breeds associated with different tribes and region of Zambia, were used in the molecular analysis research. Additionally, 10 Holstein x Jersey crossbred animals were used as a reference and to test the extent of cross-breeding, if any, of the indigenous stock with exotic breeds. To further compare the Zambian indigenous breeds, morphometric measurements including body length, heart girth, and height at withers on 50 animals of each breed were measured. Blood was collected from animals at randomly selected farms and DNA isolated by standard protocols in Zambia. A total of 10 primers, of the 20 evaluated for informativeness, were used in the RAPD-PCR analyses. Differences among the four breeds for all the three morphometric measurements were significant with the Barotse significantly higher than the other three (P<0.05). The average number of bands per primer was 7.1 and the percentage of polymorphic bands per primer ranged from 40 to 71.4 with an average of 64.8%.  Breed divergence was highest between the Tonga and the Barotse and lowest between the Tonga and Baila breeds.  Both the morphometric measurements and RAPD-based distance estimates suggest that the Barotse may be different from the other indigenous breeds while the Tonga and Baila were more closely related. In addition, the genetic distance estimates imply that the Holstein x Jersey crosses are different from the four Zambian indigenous cattle breeds evaluated. This thesis research provides, for the first time, the basic genetic information necessary for conservation of Zambian cattle breeds and the use of these populations for effective crossbreeding. The data suggest that though there is isolated by geographic distance and cultural differences among the tribes, two of the breeds are significantly related.
 
 


Genetic diversity of pharmacogenes in a Bantu-speaking cohort and evaluation of variants associated with tenofovir-induced nephrotoxicity


Identification: Tshabalala, Elizabeth

Credits: None available.

Genetic diversity of pharmacogenes in a Bantu-speaking cohort and evaluation of variants associated with tenofovir-induced nephrotoxicity
 
E. Sibongile Tshabalala1, Ananyo Choudhury2, Natasha Beeton-Kempen1, Faheem Seedat3 and Ebrahim Variava3, Neil Martinson4, Michèle Ramsay2, 5 and Dalu Mancama1
1CSIR, Biosciences Unit, South Africa: 2Sydney Brenner Institute for Molecular Bioscience, Faculty of Health Sciences, University of the Witwatersrand, South Africa; 3Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa; 4Perinatal HIV Research Unit, Baragwanath Hospital and Faculty of Health Sciences, University of the Witwatersrand, South Africa; 5Division of Human Genetics, National Health Laboratory Service, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, South Africa
 
Recent South African studies report an increase in hospital admissions due to adverse drug reactions (ADRs), including to tenofovir disoproxil fumarate (TDF). Growing evidence suggests a genetic contribution to TDF-related ADRs. Given the high genetic diversity observed in African populations, the aim of this study was to elucidate the pharmacological implications of such diversity by identifying and characterizing known and novel pharmacogenetic variants and evaluating their possible association with TDF-induced nephrotoxicity. Using targeted next generation sequencing to screen 40 Bantu-speaking individuals for variants in 65 genes, 1687 variants were identified; including 129 novel and 22 potential loss-of-function variants. Based on allele frequency (MAF>0.1) and prior association with ADRs, nine SNPs within five genes were prioritised for a genetic association study for TDF-induced nephrotoxicity (clinically manifesting as acute kidney injury (AKI)).  A total of 137 HIV positive patients on TDF treatment were subsequently genotyped using TaqMan® assays, 53 of whom presented with AKI. Association analysis was performed with alleles, genotypes and haplotypes using χ2 tests. The ABCC2 1249A allele and ABCC2 haplotypes AAC and AAT displayed associations with TDF-induced AKI (p≤0.05). The ABCC2 GTT haplotype (p=0.02) appeared to be protective against TDF-induced AKI. However, the associations were not significant following corrections for multiple testing. Further evaluation of these ABCC2 variants in larger cohorts is warranted to establish their role, if any, in TDF-induced AKI.
 


Non-typhoidal Salmonella and Zoonotic E. coli as Potential Drivers of Antimicrobial Resistance in Pastoralist Communities in Kasese District, Uganda


Identification: Walusansa, Abdul

Credits: None available.

Non-typhoidal Salmonella and Zoonotic E. coli as Potential Drivers of Antimicrobial Resistance in Pastoralist Communities in Kasese District, Uganda
 
Abdul Walusansa
School of Medicine, Islamic University in Uganda

August 2017
 
Introduction: Non-prescribed use of antimicrobials in Agriculture incurs a transfer risk of resistant pathogens to humans. The aim of this study was to determine the potential of non-typhoidal Salmonella spp and Zoonotic E. coli to serve as drivers of Antimicrobial resistance among animals and humans.
 
Methodology: A laboratory based cross-sectional study was done using archived Salmonella spp and E. coli isolates previously obtained from individuals among pastoralist communities of Kasese district, Uganda. Recovery of the isolates was done by conventional culture and Identification by biochemical methods, serotyping and PCR. Antimicrobial resistance profiling was done by using Kirby bauer disc diffusion method. Following this; the isolates were screened for resistance mechanisms including Extended Spectrum β-lactamase, Carbapenemase and AmpC production using disc diffusion based methods.
 
Results: The prevalence of Enterohemorrhagic E.coli (EHEC) and Non Typhoidal salmonella were 16% (28/180) and 50% (1/2) respectively. Of the EHEC, 94% (26/28) were of phylogroup B1, A (3%, 1/28) and B2 (3%, 1/28). The most prevalent virulence gene in the EHEC was Stx1 (100%, 28/28) followed by Stx2e (94%, 26/28), none was Stx2 positive. Highest resistance was seen to Cotrimoxazole (89%, 25/28), Tetracycline (71%,20/28), Ampicillin (65%,18/28) and Nitrofurantoin (28%,8/28), these are commonly used in the agricultural sector, whereas minimal resistance was observed to those commonly used in human medicine especially the β-lactams, β-lactam inhibitors and Carbapenems. 17%, (5/28) of the EHEC were ESBL positive, of these one (3%, 1/28) was a Carbapenemase producer. Though only one Non-typhoidal Salmonella isolate was found, it is worrying to note that it showed resistance to all the three antimicrobial agents (Nalidixic acid, Chloramphenicol and Ciprofloxacin) that are most recommended for treatment of Salmonellosis in this setting.
 
Conclusion: There is a high prevalence of highly pathogenic and resistant zoonotic E. coli and low prevalence of Non typhoidal salmonella among humans in pastoralist communities in Uganda. We suspect that these pathogens, along with their AMR genes, were acquired from animals because the zoonotic E. coli (EHEC) largely contained the animal specific Vero toxin gene VT2e and majority belonged Pylo-group B1 which has been documented as the most common EHEC phylo-group inhabiting domestic animals. Therefore, it is highly likely that zoonotic bacteria are potential drivers of antimicrobial resistance to humans in these settings and we recommend that studies involving relatedness of drug resistant isolates from humans and animals should be conducted to ascertain the role of enterohemorrhagic E. coli in the zoonotic spread of antimicrobial resistance in pastoralist communities. We recommend that a one health approach should be used to establish drivers of MDR spread in pastoralist communities.
 


Evolution of Plasmodium falciparum strains and resistance markers in pregnant women in Cameroon: 2008 - 2018


Identification: Abongwa, Acho

Credits: None available.

Evolution of Plasmodium falciparum strains and resistance markers in pregnant women in Cameroon: 2008 - 2018
 
Acho FA1, Esemu LF1, Yukie LS2, Njobe BK1, Meyahnwi D1, Belanquale CA1, Bigoga J1, Mbacham W1, Leke FGR1
1Biotechnology Centre, University of Yaoundé I, 2Department of Tropical Medicine, University of Hawaii
 
The genetic diversity of Plasmodium falciparum and the prevalence of antimalarial drug resistance markers have been extensively studied in various parts of the world. However, limited data is available on the genetic diversity of parasite infections in pregnant women and the temporal trend in the prevalence of these drug resistance markers. Blood samples were collected from 60 pregnant women in 2018 who had not received IPTp-SP. Sixty more samples, collected during a previous clinical trial carried out in 2008, from pregnant without a history of IPTp-SP use were included to compose a total sample size of 120. K1, MAD20 and RO33 allelic families of Pfmsp-1 were genotyped by nested PCR amplification. The prevalence of Pfdhfr N51I, C59R, S108N and Pfdhps A437G, K540E point mutations was determined by RFLP - PCR. A high genetic diversity was observed at both time points with 31 genotypes observed in the 2008 group and 34 genotypes in 2018. In contrast to studies in the general adult population, no single allelic family predominated. There was a significant increase in overall multiplicity of infection (MOI) from 4.42±1.819 in 2008 to 5.35±1.74 in 2018 and a marginal increase in Expected Heterozygosity (HE) from 0.8733 in 2008 to 0.897 in 2018. We found an increase in prevalence of the Pfdhfr/Pfdhps N51I, C59R, S108N/A437G quadruple mutation from 52.2% in 2008 to 75.5% in 2018 (p = 0.05319). There was a complete absence of Pfdhfr/Pfdhps quintuple mutants at both time points. No significant association was found between parasite strain and drug resistance markers (p = 0.852). The genetic diversity of Plasmodium falciparum populations in pregnant women was high. There was a marginally higher MOI and HE in 2018 than in 2008. The MOI was higher in pregnant women than reported MOI values in the general population. Our study confirms a fixation of N51I and C59R mutations in Pfdhps and Pfdhfr genes. The increase in prevalence of Pfdhfr/Pfdhps N51I, C59R, S108N/A437G quadruple mutations could herald a gradual loss in effectiveness of IPTp-SP.
 


Association of the Tumor Necrosis Factor α- 308G/A Polymorphism with Malaria and Hepatitis B Virus Infection among Nigerian Pregnant Women


Identification: Akindele, Akeem

Credits: None available.

Association of the Tumor Necrosis Factor α- 308G/A Polymorphism with Malaria and Hepatitis B Virus Infection among Nigerian Pregnant Women
 
Akeem Abiodun Akindele1, Ebunoluwa Adediran1, Olusola Ojurongbe1*
1Ladoke Akintola University of Technology, Ogbomoso, Nigeria
 
Background: Malaria and Hepatitis B Virus (HBV) could be detrimental to pregnant women and their fetus. Tumor necrosis factor (TNF-α) is believed to be a critical factor in susceptibility and progression of infectious diseases. This study investigated the contribution of TNF-308G/A genetic polymorphism to Malaria and HBV infections in pregnant women.
 
Methods: A total of 225 Nigerian pregnant women were enrolled into the study after obtaining a signed informed consent. Malaria was diagnosed by microscopic examination of Giemsa stained blood smears, while HBV was diagnosed by using HBV serological markers test kit.  ARMS-PCR was used for TNF-α genotyping.
 
Results:  Out of the 225 pregnant women screened, 57(25.3%) and 44(20%) were positive for P. falciparum parasitaemia and HBsAg respectively. The prevalence of P. falciparum parasitaemia and HBsAg co-infection was 11(4.5%). The frequency of TNF-α 308 GG genotype (54.40%) was higher compared to GA (38.60%) and AA (7.02%) in the study population. No significant difference was observed when the genotype GG of healthy control was compared with Malaria, HBV and Malaria-HBV co-infection.  None of the other two genotypes (GA and AA) showed any significant difference between cases and healthy control. Both G and A alleles did not show any significant difference between cases and healthy control.
 
Conclusion: High prevalence of malaria and HBV among pregnant women was observed in the study area. Genotypes and alleles of TNF-α 308 G/A do not play significant role in malaria and HBV infections among the study population.
 
Keywords: Tumor necrosis factor, Malaria, Hepatitis B Virus, pregnant women
 


Neuropsychiatric genetics in Africa: Building the research and the researchers together


Identification: Chibnik, Lori

Credits: None available.

 

Neuropsychiatric genetics in Africa: Building the research and the researchers together
 
Lori B. Chibnik1,2, Dickens Akena3, Lukoye Atwoli4, Symon M. Kariuki5,6, Charles R.J.C Newton5,6, Kristianna Post1,2, Dan J. Stein7, Anne Stevenson1,2, Rocky E. Stroud1,2, Solomon Teferra8, Zukiswa Zingela9, Bizu Gelaye1,2, Karestan C. Koenen1,2
1Harvard T.H. Chan School of Public Health, Boston, USA
2Broad Institute of MIT and Harvard, Cambridge, USA 
3Makerere University, Kampala, Uganda
4 Moi University, Eldoret, Kenya
5KEMRI-Wellcome Trust Research Programme, Kilifi, Kenya
6University of Oxford, Oxford, UK
7University of Cape Town, Cape Town, South Africa
8Addis Ababa University, Addis Ababa, Ethiopia
9Walter Sisulu University, Mthatha, South Africa
 
Both global mental health and neuropsychiatric genetics have made enormous strides in the past decade. However, these two fields have grown on parallel tracks, with little to no interaction. While recent advances in psychiatric genetics have identified over 100 genetic loci associated with schizophrenia that are now being used to inform translational research, large-scale genetic studies have primarily used only genomes with European ancestry. If this pattern continues, advances in genetics will be limited with the ensuing risk that therapeutic innovations leave out large segments of the global population. Researchers have launched a new initiative with the objective of improving the existing science and addressing issues of equity by growing research capacity through mentoring and training young scientists. This new program, the Neuropsychiatric Genetics of African Populations, includes a study on psychosis (NeuroGAP-Psychosis) which began collection in 2018 and aims to collect DNA and phenotypic data from more than 17,000 cases (schizophrenia and bipolar disorder) and 17,000 controls from four countries in Africa: Ethiopia, Kenya, South Africa, and Uganda, combined with a capacity building program, the Global Initiative for Neuropsychiatric Education in Research (GINGER).
Through a two-year Fellowship program GINGER combines in-person research workshops, virtual classroom activities and a series of courses run in collaboration with partner institutions in Africa. By combining research with training and mentoring we hope to ensure that the next generation is adequately prepared to take an active role in NeuroGAP-Psychosis, carry the research forward and be future leaders in the field of global neuropsychiatric genetics.
 

 


AIDS Related Genes (ARGs) polymorphisms impacting disease progression in HIV infected children and adolescents perinatally infected in Cameroon


Identification: Dambaya, Béatrice

Credits: None available.

AIDS Related Genes (ARGs) polymorphisms impacting disease progression in HIV infected children and adolescents perinatally infected in Cameroon
 
Béatrice Dambaya1,2, Céline Nkenfou1,3, Linda Mekue4, Georges Této1, Nicole Ngoufack2, Njiokou Flobert1, Vittorio Colizzi5 and Alexis Ndjolo1,6.
1Chantal Biya International Reference Centre for research on HIV/AIDS prevention and management (CBIRC), Yaoundé, Cameroon; 2Faculty of Sciences, University of Yaoundé I, Cameroon; 3Higher Teachers' Training College, University of Yaounde I; 4Faculty of Sciences, University of Dschang, Cameroon; 5University of Rome Tor Vergata, Rome Italy; 6Faculty of Medicine and biomedical Sciences, University of Yaoundé I, Cameroon
 
Background: Pediatric HIV shows heterogeneity in term of vulnerability regarding the infection. Here we investigated some AIDS Related Genes (ARGs) and described their distribution in slow progressors (SP) and long term non progressors (LTNP) and exploited the effects of their various polymorphisms in disease progression.
Methods: We analyzed blood sample of 129 children/adolescents, aged 1 to 15 years old. Among them 52 were HIV perinatally infected and 77 HIV negative among which 31 were HIV exposed uninfected (HEU) and 46 HIV non exposed uninfected (HNEU). HIV positive patients were coming at Chantal Biya International Reference Centre (CBIRC) for biological examinations and 5 were LTNP and 47 SP. Upon signed a proxy consent, their age, CD4, viral load at the set point and clinical symptoms were recorded. Biological analysis was done each six months and the polymorphisms of 5 ARGs, Trim 5α, CCR5, CCR5 promoter, CCR2 and SDF 3'A were investigate. HEU and HNEU were used as control group. p<0.05 was considered statically significant.
Results: There was no significant difference when comparing CD4 (CD4 T cells and percentage) between SP and LTNP in the population, but a significant difference was observed with CD4 T cells when comparing naïve ARV patients (p=0.04) and LTNP. A significant difference between the two groups was observed for viral load (p=0.03) in the overall population, a high difference was seen when comparing only SP naïve with LTNP with both viral load copies and log (p=0.01; p=0.005). The genotype analysis did not show any significant deviation from the Hardy-Weinberg expected frequency. Among the 5 genes, the protective allele of Trim5α (R136Q) was present in all LTNP and in 72.34% of SP. The CCR5 promoter 59029G was present in 60% of LTNP and in 34,04% of SP. CCR2V64I was almost absent, only the heterozygous form of the allele was represented with a significant difference between SP vs LTNP (p=0.0002). R136Q allele was more present in HEU than in HNEU (p<0.0001), a significant difference was observed between HNEU and SP, LTNP (p<0.0001; p=0.01). A significant difference between the two groups was in contrary observed with HEU (p<0.0001; p=0.01), with CCR5 promoter 59029G. CCR5∆32 was completely absent, SDF 3'A was almost absent in heterozygous form and completely absent in homozygous form.
Conclusion: Among the 5 genes described in the study, 3 of them, Trim 5α, CCR5 promoter and CCR2V64I retained need to be more investigated. The role of CCR5 promoter 59029G appears to be controversial.
 
Keys words: AIDS, Genes, Children/Adolescents, Perinatally infected, Progressors


Phylogeny and Prevalence of Haemosporidian Parasites of Free-ranging Domestic Birds in Northwestern Uganda


Identification: Nakayima, Jesca

Credits: None available.

Phylogeny and Prevalence of Haemosporidian Parasites of Free-ranging Domestic Birds in Northwestern Uganda
 
Jesca Nakayima1,*, Eugene Arinaitwe2, William M. Kabasa3, Paul D. Kasaija1, Constance Agbemelo-Tsomafo4, Léonce Kouakanou5, and Taiwo C. Omotoriogun6,7,8
1National Livestock Resources Research Institute, P.O. Box 5704, Nakyesasa, Wakiso, Uganda; 2National Animal Disease Diagnostics and Epidemiology Centre, P.O. Box 513, Entebbe, Uganda; 3College of Veterinary Medicine, Animal Resources and Biosecurity, P.O. Box 7062 Kampala, Uganda; 4Noguchi Memorial Institute for Medical Research, Department of Animal Experimentation, University of Ghana, Ghana; 5Laboratory of Biology and Molecular Typing in Microbiology, Faculty of Sciences and Techniques, University of Abomey Calavi, Benin; 6Biotechnology Unit, Department of Biological Sciences, Elizade University, P.M.B 002, Ilara-Mokin, Ondo State, Nigeria; 7AP Leventis Ornithological Research Institute, University of Jos, Nigeria; 8Natural History Museum, University of Oslo, Norway
Correspondence: Jesca Nakayima, National Livestock Resources Research Institute, P.O. Box 5704, Nakyesasa, Wakiso, Uganda (jescanl2001@yahoo.co.uk)
 
Background: Infection from haemosporidian parasites is a general concern for birds, including wild and domestic poultry. Avian malaria infection is well documented in birds; it can lead to suppressed immunity, poor productivity, and high mortality. There are limited studies on haemosporidian parasites in free-ranging domestic birds.
 
Objectives: The aim of the present study was to investigate the distribution, diversity, and infection of haemosporidian parasites among free-ranging domestic birds in Uganda.
 
Methodology: Blood samples (n=407) were collected from free-ranging chickens (n=304), ducks (n=70), turkeys (n=14), and guinea fowl (n=19) in Northwestern Uganda to screen for haemosporidian parasites. Microscopy was used to detect parasites based on morphological characteristics. Parasites were also detected using a nested polymerase chain reaction to amplify a fragment of cyt b in mitochondrial DNA.
 
Results: Haemoproteus (17.25%, n=69), Plasmodium (22%, n=88) and Leucocytozoon (1.75%, n=7) were detected in sampled birds. The sequences from these genera nested within their respective clades in a phylogenetic tree constructed using sequences from the MalAvi database.
 
Conclusion: Free-ranging domestic birds are a reservoir for haemosporidian parasites, suggesting the need for control and management of these parasites in Ugandan poultry systems to avoid cross transmission of associated diseases.
 
Key words: avian malaria, birds, ecosystem, haemosporidia, Uganda
 
 
 
 
 

Print Certificate
Review Answers
Print Transcript
Completed on: token-completed_on
Review Answers
Please select the appropriate credit type:
/
test_id: 
credits: 
completed on: 
rendered in: 
* - Indicates answer is required.
token-content
token-speaker-name image
token-speaker-name
token-index
token-content
token-index
token-content
token-index
token-content
token-index
token-content
token-index
token-content
token-index
token-content
/
/
token-index
token-content