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Inga Pigiņka, Edīte BirģelePORCINE CIRCOVIRUS-2 IMPACT ON THEMORPHOLOGICAL SIGHT <strong>OF</strong> PIG LYMPH NODESTable 2The structural changes of lymph nodes (scores) mainly with mild amount of PCV2 in lymph nodesThe name oflymph nodelnn. inguinalessuperf. sinisterlnn. inguinalessuperf. dexterlnn. mesentericicranialelnn.tracheobronchalesValued parametersNo. 4Number of the animalNo. 5No. 8No. 11No. 13No. 26No. 30Mean indexof parameteramount of PCV2 antigen + + + + + + + +visualization of the follicle structure 2 2 3 3 1 1 1 1.86decrease amount of lymphocytes 2 2 2 2 1 1 0 1.43increase amount of histiocytes 2 2 2 1 1 1 1 1.43amount of PCV2 antigen + + + + + + + +visualization of the follicle structure 2 2 3 3 1 1 1 1.86decrease amount of lymphocytes 2 1 2 2 1 1 1 1.43increase amount of histiocytes 2 2 2 1 1 1 1 1.43amount of PCV2 antigen + + + + + + + +visualization of the follicle structure 2 2 3 3 1 1 1 2.00decrease amount of lymphocytes 2 1 2 3 1 1 1 1.57increase amount of histiocytes 2 2 2 2 1 1 1 1.57amount of PCV2 antigen + ++ ++ + + + + +visualization of the follicle structure 2 3 3 3 2 1 1 2.14decrease amount of lymphocytes 2 2 2 3 1 1 0 1.57increase amount of histiocytes 2 2 2 2 1 1 1 1.57not visualized and two animals (No. 5 and 8) hadmoderate amount of PCV2 antigen in this lymphnode. The mentioned structural changes of lymphnodes show that the PCV2 infection process had beenmore durable to these four animals. (Ostanello et al.,2005; Opriessnig et al., 2007).Next estimated lymph nodes structural changesof piglets were in those, whose lymph nodescontained mainly moderate amount (++) of PCV2antigen (Table 3).It was noticeable that the visualization of folliclesin all lymph nodes was changed mostly (averageTable 3The structural changes of lymph nodes (scores) mainly with moderate amount of PCV2 in lymph nodesThe name oflymph nodelnn. inguinalessuperf. sinisterlnn. inguinalessuperf. dexterlnn. mesentericicranialelnn.tracheobronchalesValued parametersNumber of the animalNo. 1No. 2No. 16No. 28Meanindex ofparameteramount of PCV2 antigen ++ ++ ++ ++ ++visualization of the follicle structure 3 2 3 3 2.75decrease amount of lymphocytes 3 2 2 2 2.25increase amount of histiocytes 2 1 2 1 1.50amount of PCV2 antigen ++ ++ ++ ++ ++visualization of the follicle structure 3 2 3 3 2.75decrease amount of lymphocytes 3 2 2 2 2.25increase amount of histiocytes 2 1 2 1 1.50amount of PCV2 antigen + ++ ++ + ++visualization of the follicle structure 2 2 3 2 2.25decrease amount of lymphocytes 2 2 2 1 1.75increase amount of histiocytes 2 1 2 1 1.50amount of PCV2 antigen + + ++ + +visualization of the follicle structure 2 2 3 1 2.00decrease amount of lymphocytes 2 3 2 1 2.00increase amount of histiocytes 2 2 2 1 1.75Research for Rural Development 2012205
PORCINE CIRCOVIRUS-2 IMPACT ON THEMORPHOLOGICAL SIGHT <strong>OF</strong> PIG LYMPH NODESInga Pigiņka, Edīte BirģeleTable 4The structural changes of lymph nodes (scores) mainly with severe amount of PCV2 in lymph nodesThe name oflymph nodeValued parametersNumber of the animalNo. 3No. 7No. 9No. 10No. 15Mean indexof parameterlnn. inguinalessuperf. sinisterlnn. inguinalessuperf. dexterlnn. mesentericicranialelnn.tracheobronchalesamount of PCV2 antigen + +++ +++ +++ +++ +++visualization of the follicle structure 2 3 3 3 3 2.80decrease amount of lymphocytes 1 2 3 3 2 2.20increase amount of histiocytes 1 2 3 2 2 2.00amount of PCV2 antigen + +++ +++ +++ +++ +++visualization of the follicle structure 2 3 3 3 3 2.80decrease amount of lymphocytes 1 2 3 3 2 2.20increase amount of histiocytes 1 2 3 2 2 2.00amount of PCV2 antigen +++ +++ +++ +++ +++ +++visualization of the follicle structure 3 3 3 3 3 3.00decrease amount of lymphocytes 3 3 3 3 2 2.80increase amount of histiocytes 3 3 2 2 2 2.40amount of PCV2 antigen ++ ++ +++ ++ +++ +++visualization of the follicle structure 3 3 3 3 3 3.00decrease amount of lymphocytes 3 3 3 3 3 3.00increase amount of histiocytes 3 3 2 2 3 2.60score 2.00 – 2.75) compared to other investigatedparameters of lymph nodes.Also, lymphocytes depletion in lymph nodes ofthese animals was relatively severe, score from 1.75to 2.25; like the increase amount of histiocytes – from1.50 to 1.75 (Table 3).In the Table 4 are shown the lymph nodes structuralchanges of piglets in whose lymph nodes mainlysevere amount (+++) of PCV2 antigen was observed.It is observed, that generally in lymph nodesof animals in this group, all investigated structuralparameters had greatly changed: visualization of thefollicle structure was scored in the range from 2.80 to3.00; the amount of lymphocytes was decreased andamount of histiocytes was increased – on the averagefrom 2.00 to 3.00 scores (Table 4).By analyzing lymph nodes group individually foreach animal, it should be noted that one piglet (No. 3)had different morphological changes in lnn. inguinalessuperficiales. These changes were relatively smaller(scores 1-2), that could be associated with the mildamount of PCV2 antigen in them. Presumably PCV2was not distributed throughout the whole organismof piglet No. 3 yet, as it was observed in other fouranimals of this group.Summarizing data about all structural parameterchanges in lymph nodes, it has been concluded thatPCV2 was relatively more affected in the follicle oflymph nodes. Follicles lose their typical structure,and presumably also are affected by B lymphocytepopulation, because it is known that lymphocytes Bconcentrate directly in the follicles of lymph nodes(Willard-Mack, 2006).The amount of lymphocytes decreasedsimultaneously with the PCV2 antigen increase inthem. The question – which population of lymphocytes– T or B – decreased in lymph node, will be clarified inthe further stage of research.If the amount of PCV2 antigen in lymph nodesincreases, then the amount of histiocytes increasesaccordingly. It is thought that main target cells forPCV2 replication are the monocytes and macrophages(Rosell et al., 1999). Then macrophages ’get old’ andare overtaken by histiocytes (Willard-Mack, 2006). Itis likely that ‘fight’ between macrophages and virushas been for a long time. It is possible that those pigscould have disorder of humoral immunity (Allan etal., 1999; Bolin et al., 2001; Krakowka et al., 2001).To understand changes of individual structuralparameters of lymph nodes with different amountof PCV2 antigen better, structural changes of lymphnodes were compared with prevailing amount of thevirus antigen in lymph nodes (Table 5).Comparing the histological structure of lymphnodes with mild (+) amount of PCV2 antigen andthe structure of lymph nodes without presence ofPCV2 antigen (0), it is observed that all investigatedparameters have significant difference in structuralchanges in all lymph nodes. In all investigatedparameters, there is a significant difference instructural changes in all lymph nodes with mild andsevere amount of PCV2 antigen (Table 5).206 Research for Rural Development 2012
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Volume No. 1Annual 18th Internation
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Research for Rural Development 2012
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ContentsFOOD SCIENCESVETERINARYMEDI
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AGRICULTURAL SCIENCES (CROP SCIENCE
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Mihails Vilcāns, Jūlija Volkova,
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Mihails Vilcāns, Jūlija Volkova,
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Berit TeinEFFECT OF ORGANIC AND CON
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Methane producing bacteria use only
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according to calculations the metha
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CHANGES IN SUGAR CONTENT OF WINTERO
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PERENNIAL GRASSES FOR BIOENERGY PRO
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IMPACT OF SLURRY APPLICATION METHOD
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IMPACT OF SLURRY APPLICATION METHOD
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IMPACT OF ORGANIC PRODUCT EXTRACTS
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IMPACT OF ORGANIC PRODUCT EXTRACTS
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COMBUSTION ABILITY OF ENERGY CROP P
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COMBUSTION ABILITY OF ENERGY CROP P
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RESEARCH OF OREGANO (ORIGANUMVULGAR
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RESEARCH OF OREGANO (ORIGANUMVULGAR
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INFLUENCE OF SOIL MODIFICATION ON C
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INCIDENCE OF POSTHARVEST ROT OF CRA
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INCIDENCE OF POSTHARVEST ROT OF CRA
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PERSPECTIVES ON TRUFFLE CULTIVATION
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FACTORS AFFECTING GOAT MILK YIELDAN
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MILK UREA CONTENT AS INDICATOR FEED
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REHYDRATION KINETICS OF DRIED LATVI
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FOOD SCIENCESPreliminary RESULTS of
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PRELIMINARY RESULTS OF 1-METHYLCYCL
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FOOD SCIENCESSensory PROPERTIES and
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SENSORY PROPERTIES AND CHEMICAL COM
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THE SUITABILITY OF DIFFERENT ROWANB
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CHEMICAL COMPOSITION OF NEW TYPE AG
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FOOD SCIENCESINFLUENCE OF GENOTYPE
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INFLUENCE OF GENOTYPE AND HARVEST T
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ROOT VEGETABLES FROM LATVIA:QUANTIT
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CONTENT OF SUGARS, DIETARY FIBRE AN
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RHEOLOGICAL PROPERTIES OF TRITICALE
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acceptance and preference especiall
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CONSUMERS’ ATTITUDE TOWARDS AVAIL
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Page 157 and 158: PHYSICAL - CHEMICAL CHARACTERIZATIO
Page 159 and 160: PHYSICAL - CHEMICAL CHARACTERIZATIO
Page 161 and 162: FOOD SCIENCESTHE INFLUENCE OF DIFFE
Page 163 and 164: THE INFLUENCE OF DIFFERENT SELENIUM
Page 165 and 166: FOOD SCIENCESINVESTIGATIONS INTO TH
Page 167 and 168: INVESTIGATIONS INTO THE ENHANCEMENT
Page 173 and 174: INFLUENCE OF PACKAGING CONDITIONSON
Page 175 and 176: INFLUENCE OF PACKAGING CONDITIONSON
Page 177 and 178: FOOD SCIENCESFATTY ACID COMPOSITION
Page 179 and 180: FATTY ACID COMPOSITION OF THE MEAT
Page 181 and 182: FATTY ACID COMPOSITION OF THE MEAT
Page 183 and 184: ANTIMICROBIAL RESISTANCE OFANIMAL P
Page 189 and 190: VETERINARY MEDICINETHE SURVIVAL OF
Page 191 and 192: THE SURVIVAL OF LISTERIA MONOCYTOGE
Page 197 and 198: VETERINARY MEDICINEMicrobiological
Page 199 and 200: MICROBIOLOGICAL QUALITY OF COWS’
Page 205: PORCINE CIRCOVIRUS-2 IMPACT ON THEM
Page 209 and 210: PORCINE CIRCOVIRUS-2 IMPACT ON THEM
Page 211 and 212: PORCINE CIRCOVIRUS-2 IMPACT ON THEM
Page 213 and 214: AORTIC LUMEN DIAMETER AND BLOODPRES
Page 219 and 220: PHYSICAL MODEL OF TRACTOR IMPLEMENT
Page 225 and 226: SOLID FUEL BOILER AUTOMATION FOR BR
Page 231 and 232: INVESTMENT COSTS OPTIMIZATION OFMUL
Page 233 and 234: INVESTMENT COSTS OPTIMIZATION OFMUL
Page 235 and 236: DYNAMIC MODEL OF BIOCHEMICAL NETWOR
Page 237 and 238: DYNAMIC MODEL OF BIOCHEMICAL NETWOR
Page 239 and 240: EDUCATIONAL SCIENCESCHILDREN WITH S
Page 241 and 242: CHILDREN WITH SPECIAL NEEDS FAMILY
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