Hemorrhagic septicaemia is caused by Pasteurella multocida bacteria. It primarily affects cattle and water buffaloes in Asia, Africa, parts of Europe and the Middle East. The disease is characterized by a rapid onset and high fever, respiratory distress, edema, and hemorrhaging. Mortality approaches 100% if left untreated. Prevention focuses on vaccination programs in endemic areas. Diagnosis involves isolating P. multocida from blood or organ samples of infected animals.
Bovine herpesvirus 1 (BHV-1) is associated with several diseases in cattle: infectious bovine rhinotracheitis (IBR), infectious pustular vulvovaginitis (IPV), balanoposthitis, conjunctivitis, abortion, encephalomyelitis, and mastitis.
Bovine herpesvirus 1 (BHV-1) is associated with several diseases in cattle: infectious bovine rhinotracheitis (IBR), infectious pustular vulvovaginitis (IPV), balanoposthitis, conjunctivitis, abortion, encephalomyelitis, and mastitis.
Canine parvovirus (CPV) is a highly contagious and relatively common cause of acute, infectious GI illness in young dogs. Although its exact origin is unknown, it is believed to have arisen from feline panleukopenia virus or a related parvovirus of nondomestic animals. It is a nonenveloped, single-stranded DNA virus, resistant to many common detergents and disinfectants, as well as to changes in temperature and pH. Infectious CPV can persist indoors at room temperature for at least 2 mo; outdoors, if protected from sunlight and desiccation, it can persist for many months and possibly years.
Parvo virus infection in dog - preventive medicinerajboy19
Canine parvovirus is a highly contagious infection of dogs caused by a Parvovirus. This slide include virology,transmission,pathogenesis,clinical sign and symptoms,diagnosis, differential diagnosis,treatment, prevention and control.
Blue tongue is a non-contagious, infectious, arthropod-borne viral disease of sheep, goat, cattle and deer, with a worldwide distribution. Initially, the disease was reported in sheep in South Africa in 1881 and it was ascribed as “epizootic catarrh”. In 1905, the disease was renamed as “blue tongue”. In India, the first outbreak of blue tongue disease in sheep and goat was reported by Sapre (1964) from Maharashtra. It is listed under category ‘A’ of disease by OIE. The presence of this disease disrupts international commerce by putting a trade barrier on the movement of animals, their germplasm as well as animal products (OIE Bulletin, 1998).
etiology, local names, definition, transmission, source of infection, epidemiology, pathogenesis, clinical signs, diagnosis, differential diagnosis, treatment prevention and control
Toxoplasmosis is considered one of the neglected parasitic infections of the United States, a group of five parasitic diseases that have been targeted by CDC for public health action.Q fever is a disease caused by the bacteria Coxiella burnetii. This bacteria naturally infects some animals, such as goats, sheep, and cattle. C. burnetii bacteria are found in the birth products (i.e. placenta, amniotic fluid), urine, feces, and milk of infected animals.
Canine parvovirus (CPV) is a highly contagious and relatively common cause of acute, infectious GI illness in young dogs. Although its exact origin is unknown, it is believed to have arisen from feline panleukopenia virus or a related parvovirus of nondomestic animals. It is a nonenveloped, single-stranded DNA virus, resistant to many common detergents and disinfectants, as well as to changes in temperature and pH. Infectious CPV can persist indoors at room temperature for at least 2 mo; outdoors, if protected from sunlight and desiccation, it can persist for many months and possibly years.
Parvo virus infection in dog - preventive medicinerajboy19
Canine parvovirus is a highly contagious infection of dogs caused by a Parvovirus. This slide include virology,transmission,pathogenesis,clinical sign and symptoms,diagnosis, differential diagnosis,treatment, prevention and control.
Blue tongue is a non-contagious, infectious, arthropod-borne viral disease of sheep, goat, cattle and deer, with a worldwide distribution. Initially, the disease was reported in sheep in South Africa in 1881 and it was ascribed as “epizootic catarrh”. In 1905, the disease was renamed as “blue tongue”. In India, the first outbreak of blue tongue disease in sheep and goat was reported by Sapre (1964) from Maharashtra. It is listed under category ‘A’ of disease by OIE. The presence of this disease disrupts international commerce by putting a trade barrier on the movement of animals, their germplasm as well as animal products (OIE Bulletin, 1998).
etiology, local names, definition, transmission, source of infection, epidemiology, pathogenesis, clinical signs, diagnosis, differential diagnosis, treatment prevention and control
Toxoplasmosis is considered one of the neglected parasitic infections of the United States, a group of five parasitic diseases that have been targeted by CDC for public health action.Q fever is a disease caused by the bacteria Coxiella burnetii. This bacteria naturally infects some animals, such as goats, sheep, and cattle. C. burnetii bacteria are found in the birth products (i.e. placenta, amniotic fluid), urine, feces, and milk of infected animals.
Important Zoonotic disease and its prevention and control By: Dr.Manoj karkimanojj123
Zoonosis are those disease and infection which are naturally transmitted between animals and human. (WHO & FAO, 1959).
Zoonosis word derived from Greek word “ZOO” means Animals and “NOSES” means Disease.
One Health is not a new concept, but it has become more important in recent years because many factors have changed the interaction among human, animals and the environment. These changes have caused the emergence and re-emergence of many disease.
Erysipelas is an infectious disease mostly of growing or adult swine.
The disease may be acute, subacute, or chronic.
Although acute septicemic swine erysipelas can result in a high mortality rate, the greatest economic loss probably occurs from the chronic, nonfatal forms of the disease.
It may be clinically inapparent, may cause
acute illness
involving many animals, Sudden and unexpected deaths
chronic disease characterized by
enlarged joints, lameness, and endocarditis.
Rhomboid skin (diamond-skin) lesions are an inconsistent feature only associated with acute cases
Hantavirus has taken a life in different countries and has been a real concern across the globe. There have been several cases of Hantavirus in India in the past. In 2008, 28 people from the Irula community in Tamil Nadu’s Vellore district reported contracting the virus. In 2016, a 12-year-old boy in Mumbai died of this disease. Knowing the importance of this virus, this presentation may be helpful in giving an overview of that virus.
Malaria is the third leading cause of death due to infectious disease.
It affects 300- 500 million people annually worldwide and accounts for over 100 million deaths, mainly in African children under the age of 5 years. A child in Africa dies every 30 seconds of malaria.
Years of research and Millions of Dollars have been spend in the quest to eradicate this deadly infectious disease. The War is still on but is the mission impossible. This presentation was made during a graduate class to review the victories and the challenges so far in the treatment and vaccination against this disease.
More still need to be done but their seems to be light at the end of the tunnel.
Malaria is not inevitable, it can be eradicated, the mission is possible if only we devote ourselves to quality research and we never give-up. (Oseni Saheed Oluwasina (2013))
haemophilus -- Bactriology
هذا العرض يتحدث عن احد اخطر انواع البكتريا وهي التي تتغذا على مكونات الدم بالتحديد
-----------------------------------------------------------------------
https://t.me/GoldenAlzaidy
-----------------------------------------
youtube روابط لشرح الموضوع على ال
.................................
https://www.youtube.com/watch?v=QCMj9d5QBpU&t=22s
.................................
https://www.youtube.com/watch?v=fM_vLqzxLZg&t=4s
.................................
https://www.youtube.com/watch?v=ymegUm0UB7c&t=206s
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
Acute scrotum is a general term referring to an emergency condition affecting the contents or the wall of the scrotum.
There are a number of conditions that present acutely, predominantly with pain and/or swelling
A careful and detailed history and examination, and in some cases, investigations allow differentiation between these diagnoses. A prompt diagnosis is essential as the patient may require urgent surgical intervention
Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
NVBDCP.pptx Nation vector borne disease control programSapna Thakur
NVBDCP was launched in 2003-2004 . Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding arthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
Hemodialysis: Chapter 3, Dialysis Water Unit - Dr.Gawad
Haemorrhagic septicaemia 9th
1. HAEMORRHAGIC SEPTICAEMIA
Aetiology,Epidemiology,Diagnosis andPrevention
AETIOLOGY
Pasteurella multocida.Order:Pasteurellales.Family:Pasteurellaceae
The disease iscausedbycertainserotypesof Pasteurella multocida,aGram-negative
coccobacillus residingmostlyasacommensal inthe nasopharynx of animals. The AsianserotypeB:2
and the Africanserotype E:2correspondingtothe newer6:B and 6:E classificationare mainly
responsible forthe disease
Otherserotypes,namelyA:1,A:3,have beenassociatedwithaHS-like conditionincattle and
buffaloesinIndiawithmainlypneumonialeadingtodeath. The letterdenotesthe capsularantigenand
the numberstandsfor the somaticantigen
Resistance to physical and chemical action
P. multocidaissusceptibletomildheat(55°C),mosthospital disinfectantsand cansurvive forhoursand
probablydaysinthe moistsoil and water.
EPIDEMIOLOGY
Haemorrhagicsepticaemia(HS) isa majordisease of cattle andbuffaloescharacterisedbyanacute,
highlyfatal septicaemiawithhighmorbidityandmortality
In manyAsiancountriesHSdisease outbreaksmostlyoccurduringthe climaticconditionstypical of
monsoon(highhumidityandhightemperatures)
Hosts
Cattle andwater buffaloes(Bubalusbubalis) are the principal hostsof hemorrhagicsepticaemia,anditis
widelyconsideredthatbuffaloesare the more susceptible,insheep,goatsand swine;itisnota frequent
or significantdisease.Infrequentcaseshave beenreportedindeer,camels,elephants,horses,donkeys
and yaks.
Laboratory rabbitsandmice are highlysusceptibletoexperimental infection
There are noreportedcasesof humaninfection Cattle,waterbuffalo,andbisonappeartobe the
reservoirsof infection
Transmission
P. multocida istransmittedby directcontactwithinfectedanimalsandonfomites
Cattle and buffalobecome infectedwhentheyingestorinhale the causativeorganism, whichprobably
originatesinthe nasopharynx of infectedanimals.Inendemicareas,upto5% of cattle and waterbuffalo
may normallybe carriers.The worstepidemicsoccurduringthe rainyseason,inanimalsinpoorphysical
condition.Stressessuchasa poorfoodsupplyare thoughtto increase susceptibilitytoinfection,and
close herdingandwetconditionsseemtocontribute tothe spreadof the disease
P. multocida can survive forhoursand possiblydaysindampsoil orwater;viable organismsare not
foundinthe soil or pasturesafter2–3 weeks. Bitingarthropodsdonot seemtobe significantvectors
Sources of the agent
Blood:septicaemiainHSoccurs at the terminal stage of the disease,therefore,bloodsamplestaken
fromsick animalsbefore deathmaynotalwayscontain P.multocida organisms
Nasal secretions: organismsare alsonot consistentlypresentinsickanimals
Occurrence
Hemorrhagicsepticaemiaisanimportantdisease inAsia,Africa,some countriesinsouthernEurope,and
the Middle East.It has neverbeenconfirmedinMexico,Central orSouthAmerica
DIAGNOSIS
Some characteristicepidemiologicandclinical featuresaidinthe recognitionof HS.Of particular
significance isahistoryof earlieroutbreaksandarecentfailure tovaccinate
Sporadiccasesare more difficulttodiagnose clinically
2. The seasonof the year,rapidcourse,and highherdincidence,withfeverandoedematousswellings
indicate typical HS. Characteristicnecropsylesionssupportthe clinical diagnosis;confirmationrequires
the isolationandcharacterisationof the pathogenusingconventional andmoleculartechniques
The incubationperiodvariesfrom3–5 days.
In experimental infectionswithlethal doses,cattle orbuffalodevelopclinicalsignswithinafew hours
and die within18–30 hours. Morbiditydependsonimmunity andenvironmental conditions,including
bothweatherandhusbandry;morbidityishigherwhenanimalsare herdedclosely,inpoorcondition,or
exposedtowetconditions. Mortalityisnearly100% unlessthe animal istreatedveryearlyinthe
disease;few animalssurvive once theydevelopclinical signs.
Antibiotictreatment is effective ifit is started very early,duringthe pyrexic stage. Variousvaccines
can provide protectionfor6–12 months
Clinical diagnosis
Acute or per acute;A fever,dullness, andreluctancetomove are the firstsigns.Salivationandaserous
nasal discharge develop,andoedematousswellingsbecome apparentinthe pharyngealregion;these
swellingsspreadtothe ventral cervical regionandbrisket. Mucousmembranesare congested
Respiratorydistressoccurs,andthe animal usuallycollapsesanddies6–24 hoursafterthe firstsignsare
seen.Eithersuddendeathora protractedcourse up to 5 days isalsopossible.Animalswithclinical
signs,particularlybuffalo,rarelyrecover. Chroniccasesdonot seem to occur
Buffaloesare generallymore susceptible toHSthancattle and show more severe formsof disease with
profoundclinical signs. Inendemicareasmostdeathsare confinedtooldercalvesandyoungadults
Massive epizooticsmayoccurin endemicaswell asnon-endemicareas. Inthe recentpast,HS has been
identifiedasasecondarycomplicationincattle andbuffalosfollowingoutbreaksof footandmouth
disease (FMD).Case fatalityapproaches100% if treatmentisnotfollowedatthe initial stage of infection
Lesions
Widespreadhaemorrhages,oedema,andhyperaemia,consistentwithsevere sepsis. Oedemaconsists
of a coagulatedserofibrinousmasswithstraw-colouredorbloodstainedfluid. Swellingof the head,
neck,and brisketoccursinnearlyall cases.Similarswellingscanalsobe foundinthe musculature
Subserosal petechial haemorrhagesmayoccurthroughoutthe body,and the thoracic andabdominal
cavitiesoftencontainblood-tingedfluid Scatteredpetechiae maybe visible inthe tissuesandlymph
nodes,particularlythe pharyngeal andcervical nodes;thesenodesare oftenswollenandhemorrhagic
Pneumoniaorgastroenteritisoccasionallyoccurs,butusuallyisnotextensive.
Atypical cases,withnothroat swelling andextensive pneumonia,are sometimesseen. Thereare no
microscopicfeaturesthatare specificforhemorrhagicsepticaemia –all lesionsare consistentwith
severe endotoxicshockandmassive capillarydamage
Differential diagnosis
ShippingfeverisoftenmistakenlyconfusedforHS,buthas a multifactorial aetiology(oftenMannheimia
haemolytica),isnotsepticaemic,anddoesnotcause multisystemicpetechial haemorrhages
The peracute nature of the disease andthe extensive oedemaandhaemorrhage make itdifficultto
differentiatefromblacklegandanthrax.
Acute salmonellosis,mycoplasmosis,andpneumonicpasteurellosisshouldalsobe considered
Laboratory diagnosis
Samples
P. multocida isnot alwaysfoundinbloodsamplesbefore the terminal stage of the disease,andisnot
consistentlypresentinnasal secretionsorbodyfluidsof sickanimals. Infreshlydeadanimals,a
heparinisedbloodsampleorswabshouldbe collectedfromthe heartwithinafew hoursof death,and a
nasal swab. A longbone shouldbe takenfromanimalsthathave beendeadfora longtime.Other
visceral organsmayalso be sampled if anecropsyisnot feasible,bloodsamplescanbe takenfromthe
3. jugularveinbyaspirationorincision;bloodsamplesshouldbe placedinastandardtransportmedium
and transportedonice packs.Spleenandbone marrow provide excellentsamplesforthe laboratory,as
these are contaminatedrelativelylate inthe post-mortemprocessbyotherbacteria. Tipsof ears(from
live animal only)
Procedures
Identificationofthe agent
Serological tests
Serological testsare notnormallyusedfordiagnosis;however,hightitres(1:160or higherby indirect
haemagglutination) insurvivingin-contactanimalsare suggestive of the disease
For more detailedinformationregardinglaboratorydiagnosticmethodologies,
PREVENTION AND CONTROL
Sanitaryprophylaxis
Vaccinationisroutinelypracticedinendemicareas.Avoidingcrowding,especiallyduringwetconditions,
will alsoreduce the incidence of disease.
Medical prophylaxis
Antimicrobialsusceptibilitytesting(AST) isparticularlynecessaryfor P.multocida forwhichresistance to
commonlyusedantimicrobial agentshasoccurred
The followingagentshave proventheirclinical efficacy:penicillin,amoxicillin(orampicillin),
streptomycin,gentamicin,spectinomycin,florfenicol,tetracycline,sulfonamides,
trimethoprim/sulfamethoxazole,erythromycin,andnorfloxacin
Inactivatedvaccines
Vaccination is routinely practiced in endemic areas
Three preparationsare used – dense bacterinscombinedwitheitheralumadjuvantoroil adjuvant,and
formalin-inactivatedbacterins;the oil adjuvantbacterinisthoughttoprovide protectionforupto one
yearand the alum bacterinfor4–6 months
Maternal antibodyinterfereswithvaccine efficacyincalves
Live attenuated vaccines
A live HSvaccine preparedusinganavirulentP.multocidastrainB:3,4(Fallow deerstrain) hasbeenused
for control of the disease incattle andbuffaloesover6monthsof age inMyanmar since 1989; it is
administeredbyintranasal aerosol application(atrial of the vaccine hasbeencompletedinIndonesia).
PUBLIC HEALTH
There are noconfirmedreportsof humaninfectionswithP.multocidaserotypesB:2andE:2; however,
otherserotypesdocause humaninfectionsandprecautionsshouldbe takentoavoidexposure