Tropical theileriosis is a major protozoan disease of cattle and is associated with high rates of morbidity and mortality. Indigenous cattle (Bos indicus) are less affected by this disease than exotic and crossbred cattle. Genetic basis of resistance to tropical theileriosis in indigenous cattle is not well studied. Recent reports suggest that number of immune response genes expressed differentially in exotic and indigenous breeds play an important role in breed specific resistance to tropical theileriosis. Such studies comparing expression of these genes in crossbred cattle and indigenous cattle are lacking. The present study compares the mRNA expression of immune-related genes in response to Theileria annulata infection in indigenous and crossbred cattle. Peripheral blood mononuclear cells (PBMCs) were isolated from blood samples of indigenous (Tharparkar) and crossbred (HF/BS/Jersey × Hariana) cattle and challenged with prepared ground-up tick supernatant carrying Theileria annulata sporozoites in vitro. qPCR was employed to measure relative mRNA expression of toll-like receptor 10 (TLR10), signal-regulatory protein alpha (SIRPA), MHC class II DQα (BoLA-DQA), musculoaponeurotic fibrosarcoma (MAF) and prion protein (PRNP) genes in infected and control PBMCs from crossbred and indigenous cattle. On the basis of comparative fold change analysis, significant up-regulation in SIRPA, PRNP and MHC DQα genes and significant down-regulation in TLR10, cMAF and MAFB genes in crossbreds as compared to indigenous cattle was observed. Results of the present study suggest that breed specific differential expression of the genes under study may contribute to the breed specific resistance to Theileria annulata infection in indigenous cattle compared to crossbred cattle.

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Aim: The present study was undertaken to identify whether single nucleotide polymorphism (SNP) rs109231409 located on mannose-binding lectins 1 (MBL1) gene was associated with mastitis tolerance/susceptibility. Materials and Methods:After grouping 100 Vrindavani crossbred cattle as mastitis positive and negative animals, they were genotyped using polymerase chain reaction (PCR)-restriction fragment length polymorphisms method. Gene and genotype frequencies of different patterns were estimated by standard procedure (POPGENE version 1.32, (University of Alberta, Canada) and statistical analysis was carried out by logistic regression methods using STATA 12 software (StataCorp LP, USA). Results:The 588 bp fragment of MBL1 gene was amplified using PCR. PCR product was digested with ApaI restriction enzyme showed two distinct genotypes viz., GG (311 bp and 272 bp fragments) and GA (588 bp, 311 bp and 277 bp fragments). The gene, genotype frequencies, average heterozygosity, polymorphic information content and χ 2 values for the locus rs109231409 was ascertained. Conclusions:No significant association between SNP "rs109231409" with mastitis tolerance was found. Although there is a lack of association, further studies have to be undertaken in a large population in order to validate the impact of rs109231409 (g.855G >A) on mastitis tolerance.

The present study describes the prevalence of extended spectrum b-lactamases (ESBL) producing E. coli in raw chevon, milk and human samples in different districts of Chhattisgarh state. A total of 330 samples comprising of chevon (n=126), raw milk (n=104), human urine and stool (n=100) were collected from Bilaspur, Durg, Raipur, Rajnandgaon and Dhamtari districts of Chhattisgarh and processed for isolation of E. coli. The biochemically confirmed E. coli isolates were further screened of for the presence of bla TEM gene by PCR amplification. Analysis of samples indicated an overall prevalence of 31.52%. The highest prevalence of E. coli was recorded in fresh chevon samples (38.09%) followed by human urine samples (37.14%), human stool samples (30%) followed by milk samples (20.19%). In -vitro antibiotic sensitivity test of E. coli isolates revealed that all isolates to be highly sensitive towards imipenem, gentamicin, ciprofloxacin, amoxyclav, ampicillin, oxytetracyclin. The highest numbers of E. coli isolates were found resistant to erythromycin, cefotaxim, ceftazidime, cephalexin and cifixime. The 49 E. coli isolates were found to have Multiple Antibiotic Resistance (MAR) index more than 0.2, thus indicating indiscriminate use of antimicrobials. The 44 (42.3%) isolates were identified as presumptive ESBL producers and out of them 39.4% isolates were found to harbour the bla TEM gene on their plasmid DNA indicating the presence of multidrug resistant ESBL producing E. coli in foods of animal origin and human samples.

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