Prevalence Of Haemonchus Contortus Biology Essay

Some house holds in metropoliss depend on farm animal maintaining as a beginning of support. Most urban husbandmans have resorted to maintaining animate beings which require less infinite for illustration little ruminants since land in urban countries is a scarce resource. Uganda has a sum of 5.2 million caprine animals harmonizing to a study by the Uganda agency of statistics.

In mukono territory, 2.9 % of the agricultural families rear sheep and the entire figure of sheep reared is 4,530. Out of 100 households,44.22 of them rear 1 sheep, 47.99 rear 2-4 sheep, 5.78 rear 5-9 sheep, 1.55 rear 10-19 sheep, 0.42 rear 20-49 sheep and 0.04 rear 50-99 sheep. ( UBOS study ) .

19.5 % of the agricultural families rear caprine animals and the entire figure of caprine animals reared are 59,598. out of every 100 households,30.58 rear 1 caprine animal, 57.85 rear 2-4 caprine animals, 9.83 rear 5-9 caprine animals, 1.38 rear10-19 caprine animals, 0.28 rear 20-49 caprine animals and 0.08 rear 50-99 caprine animals. ( UBOS study ) .

Goats and sheep have legion helminthes parasites, many of which are shared by both species. The most of import include roundworms ( tineas ) , tapeworms ( cestodes ) , and flukes ( good lucks ) .


In Mukono abattoir the prevalence of Haemonchus contortusA ( barber pole worm ) in the caprine animals and sheep slaughtered is non known yet these parasites affect the quality of meat. These parasites cause diseases and lead to bonyness of the animate beings therefore impacting the quality of the meat.

The parasites besides cause economic loss to the husbandmans since an animate being in hapless wellness status will bring a little sum of money.

1.2 Justification

Because Haemonchus contortusA ( barber pole worms ) cause diseases in caprine animals and sheep, in order to efficaciously command these diseases it is of extreme importance to hold a record on the prevalence of the parasite.

Surveies in butcheries are an first-class agencies of cognizing the causes of prevailing ruminant diseases in an country. ( Adoun. , 2012 )

1.3 Aim

1.3.1 Overall Aim

To set up the prevalence Haemonchus contortus ( barber pole worms ) in caprine animals and sheep slaughtered in the butchery and how it can be controlled.

1.3.2 Specific OBJECTIVES

To cognize the prevalence of Barber pole worms in caprine animals

To cognize the prevalence of Barber pole worms in sheep


The prevalence of Haemonchus contortus ( barber pole worms ) in caprine animals and sheep in mukono butchery is non high.

Chapter TWO


2.1 Haemonchus contortus ( barber pole worms ) in caprine animals and sheep

Gastrointestinal roundworms, normally known as worms, present the greatest danger to the caprine animal and industry.Haemonchus contortus, normally referred to as the Barber pole worm, is a clinical job for caprine animals sheep. ( Maria Lenira Leite. , 2006 ) It gets its name due to the Barber pole visual aspect consisting of the white ovaries that twist around the ruddy blood filled intestine. ( Jim MillerA .,2000 )

Haemonchus contortusA is cylindrically shaped, tapered at both terminals, and has a complete digestive system.

This rapacious bloodsucking parasite causes anemia and bottle jaw and has a enormous capacity to reproduce through egg-laying. ( Lynn Pezzanite et al. , )

The larvae and the grownups cause little bleedings at sites of the abomasal mucous membrane where they feed. The ingesta may be ruddy brown and fluid. Worms may either be attached to the mucous membrane or free in the lms. ( Love and Hutchinson.,2003 )

Anemia, low packed cell volume ( PCV ) , diarrhea, desiccation, peripheral, and internal fluid accretion are common marks of Barber pole worm infestation. Infested caprine animals and sheep have lower growing rates, reduced generative public presentation, and are susceptible to diseases that finally lead to death.A Haemonchus contortusA may accordingly account for a great decrease of net incomes in little ruminant operation. ( Maria Lenira Leite. , 2006 )

2.2 Distribution

the happening and prevalence of Barber pole worms is determined by the climatic conditions of the country. The development of eggs and larvae is limited to countries and seasons where grazing lands are damp during the warm months of the twelvemonth. However, the larvae can last on grazing land for some clip, peculiarly during cool conditions, and can impact sheep outside the favourable periods for development. ( Dr Brown Besier. , 2011 )

2.3 Factors that contribute to barber pole worm infestation in caprine animals

Environment with high temperatures, humidness, and rainfall

Familial makeup of caprine animals makes them extremely susceptible

Resistance to vermifuges as a consequence of inordinate use

2.4 Life rhythm

The worms occur in the fourth stomach or 4th tummy of sheep and caprine animals. They are up to 3 centimeter long. The life rhythm is typical of tineas of sheep. Adult worms lay about 5000 eggs which pass out in the fecal matters of the host. Samuel barbers pole worms are the highest egg manufacturers of all sheep worms. The eggs hatch within a few yearss, and microscopic larvae emerge. They migrate on to the grazing land, where they may be ingested with the pasturage grazed by sheep. In the sheep ‘s intestine, larvae develop to adult worms in approximately three hebdomads. ( Dr Brown Besier. , 2011 )

If the worm enters the survival phase of arrested development, it could last for months. Arrested development involves the larvae staying in the fourth stomachs of the animate being without maturating until months afterwards. This allows the worm to last the winter months when the egg and larvae do non boom good on the land. The survivability of the nonparasitic phase of H. contortus is short ; in fact, most morbific larvae vanish from the grazing land within 4-6 hebdomads in a wet tropical environment ( Waller, 2004 ) .

2.5 Signs of the Barber pole worm infestation in caprine animals and sheep



Unthrift visual aspect, unsmooth hair coat, depression, low energy, and lassitude.

Significantly reduced growing and generative public presentation

Fluid accretion in sub-mandibular tissues ( bottle jaw ) , venters, pectoral pit, and intestine wall

Blood loss, white mucose membranes, and anaemia. ( Maria Lenira Leite. , 2006 )

2.6 Effectss of Barber pole infestation in caprine animals and sheep

HaemonchusA suck blood from the liner of the tummy, doing anemia.

Animals with heavy infections ofA HaemonchusA deficiency staying power, have pale gums and conjunctiva, and may besides hold bottle-jaw or irregularity. Sheep and caprine animals with lighter loads have a gradual oncoming of weight loss and loss of coloring material in the gums and conjunctiva

If present in big Numberss, A HaemochusA can kill caprine animals and sheep. In these animate beings big, ruddy multitudes of worms are clearly seeable in the tummy. The tummy contents are frequently brown because of shed blooding from the tummy liner and the liner has pin-point blood musca volitanss on it. The blood of the caprine animals and sheep is watery due to anaemia.

In animate beings with lighter infections worms are present in the tummy, but the liner of the tummy looks normal.

2.7 Hazard factors for Haemonchosis in caprine animals and sheep

The likeliness of haemonchosis eruptions is highly hard to foretell, and varies from one twelvemonth to the following. ( Dr Brown Besier. , 2011 ) The hazard factors include ;

2.7.1 History of happening

The best usher to the likeliness of an eruption is the old history of haemonchosis on the single farm or in the territory, and how this varies with seasonal conditions.

2.7.2 Weather and season

Samuel barbers pole worm larvae need warm conditions and wet on the land to develop. The hazard of haemonchosis eruptions is increased in tropical conditionss.

2.7.3 Pastures

Samuel barbers pole worm can last where grazing land remains green over summer. Typical state of affairss include perennial grazing lands and countries of wet along brook and around troughs and ooze points. Irrigated grazing lands pose an particularly high hazard.

2.7.4 Type of animate being

Sheep and caprine animals with a low or impaired unsusceptibility to worms have a greater hazard of haemonchosis. This includes lambs and childs for two to three months after lambing. ( Dr Brown Besier. , 2011 )

2.8 Management patterns that can be used to command barber pole populations in caprine animals and sheep

Avoid graze caprine animals and sheep on less than 3 inches of grazing land canopy. Larvae are unable to mount higher than this on the grass and therefore will non be ingested.

Increase usage of browse in croping systems. Parasite larvae can non mount up onto browse so caprine animals do n’t consume them.

Rotate species on grazing lands. For illustration graze cowss or Equus caballuss behind caprine animals and sheep. Because parasites are species specific, when a cow or Equus caballus ingests a caprine animal parasite it merely dies without doing harm.

Do non feed on the land. Elevated feeders help to extinguish faecal taint and therefore parasite transmittal.

Make sure that H2O and mineral beginnings are non contaminated with fecal matters.

Allow pastures to “ rest ” for at least one twelvemonth before leting animate beings back on them. Larvae will hold a difficult clip lasting that long without a host and hence the grazing land will be comparatively worm-free.

Use one-year eatages in your grazing land systems and till the land between harvests. The act of ploughing tends to kill or interrupt the larvae and eggs, cut downing transmittal. Additionally, one-year eatages tend to make best when grazed at higher degrees ( 4 to 6 inches of canopy ) . ( Jackie Nix. , 2006 )

Control programmes for Haemonchus contortus in caprine animals and sheep

Prevention, instead than remedy, is the doctrine used in developing control plans against GI roundworms. It must be assumed that worms can non be eradicated but may be limited to the extent that they will non do serious economic loss to the manufacturer. A combination of intervention and direction are necessary to accomplish control. Several attacks to the usage of vermifuges are considered. ( Thomas M. Craig. , 1999 )


The strategic attack is the usage of an anthelminthic at a clip when most of the entire worm population is within the host and non on the grazing land. This attack can be used when the animate beings are moved from a contaminated grazing land to a about parasite free grazing land.


When conditions conditions have been favourable for the transmittal of, extinguishing worms from the GI piece of land before they have the chance to reproduce and farther pollute the environment is a tactical attack. The timing of tactical deworming may be based on recent rain or it may be based on increasing faecal egg counts.


Treatment of vermiculate persons may turn out to be a worthwhile enterprise particularly where opposition to vermifuges is widespread. Persons in a flock will hold a higher egg elimination count than the norm. This over-distribution of the parasite population can be lessened by the selective intervention of vermiculate persons or by the remotion of these persons from the flock.


Salvage ( intervention to salvage lives, non command parasites ) is why vermifuges are often used in little ruminants. This is intervention in the face of disease ; the animate beings are often anaemic, have bottle jaw or diarrhoea due to the effects of worms. Whatever the instance, animate beings may be in despairing passs and even if they have the familial ability to defy worms, they will be overwhelmed. Although vermifuges may take 1000s of worms from each of the treated animate beings, the grazing lands from which they came have one million millions of larvae expecting consumption. Under these fortunes, interventions at 2 to 3 hebdomad intervals may hold to be practiced until upwind conditions are no longer favourable for transmittal.

Pasture Rotation

Pasture rotary motion may diminish parasite Numberss in deferred graze systems where a grazing land is rested for at least 6 months during the cool or 3 months during the warm portion of the twelvemonth. ( Thomas M. Craig. , 1999 )

Small ruminant production in Uganda

There are about 400 million caprine animals in the universe, with Africa accounting for 67 % . In East Africa, Kenya has a goat population of 6.4 million, Tanzania 4.3 million and Uganda 3.9 million. One method of increasing the figure of caprine animals and sheep is to choose for duplicating traits within a population. The duplicating rate of East African caprine animals is 30 % and threes occur at the frequence of 2 % . Goats have a alone eating feature of shoping which histories for 60 % while the graze penchant is merely 40 % .

Goats and sheep make an of import part to the subsistence subsector of the economic system of Uganda and, so, of many states in Africa. Over one million caprine animals and sheep are slaughtered and consumed yearly for meat. The teguments contribute well to foreign exchange net incomes every bit good as allowing import permutation for usage in the local tannery and leather trade industry of Uganda. Locally the teguments are used extensively in traditional techno civilization.

They are used notably in the devising of mats, covering grips of tools ( knives, dancing costumes, ropes, membranophones and shields ) and covering cosmetic articles. Footwear, strings and specific musical instruments are besides made from teguments.

Alien caprine animals of the Toggenburg and Anglo-Nubian strains were imported to Uganda for cross-breeding with local caprine animals with a position to heightening milk output and meat production in the progeny. In the early 1960s alien wool sheep were introduced into Uganda and were bred on Government farms with the aim of measuring their ability to last, reproduce and bring forth wool and meat in Uganda ‘s climatic, proficient and direction environment.

Alien sheep, caprine animals and their crosses with autochthonal stock are more susceptible to helminth infection than the local strains. Therefore every attention should be taken to establish an effectual government of preventative steps consisting equal rotational systems of croping coupled with strategic contraceptive screen and all reinforced by regular chemotherapeutic preventative interventions. ( Nsubuga )

Breeds of caprine animals

In Uganda there are three distinguishable strains of caprine animal reared for meat production.

The commonest type is the smallest of the three and can be described as the Small East African ( SEA ) . Its mature unrecorded weight is 20-25 kilogram. It occurs extensively in northern and eastern short Savannah ecological countries and the drier countries of Buganda in the northern parts of Luwero and Mukono territories ( Buruli, Bulemezi and Bugerere ) .

The 2nd type is described as the Mubende caprine animal. This is a big animate being of 30-35 kilograms unrecorded weight. It is renowned for its popular tegument on the international market. The tegument is called “ Kampala tegument ” in trade circles. This strain is concentrated in the Mubende District.

The 3rd type falls in between the first two in unrecorded weight, 25-30 kilogram. Its typical ecological niche is in Kabale, Kisoro and Rukungiri in Kigezi District. It is referred to as the Kigezi caprine animal. ( Nsubuga )

Chapter THREE


3.1 Study country

Mukono butchery is located in Kyetume Mukono territory.

3.2 Study Population and Sampling Technique:

The survey populations will be sheep and caprine animals of different ages and organic structure conditions brought from different parts of the state to the butchery for the intent of meat production. Simple random trying method will be used to choose the survey units. ( Sintayehu and Mekonnen. , 2012

3.3 Study Type and Sample Size Determination:

A cross sectional survey will be used to find the prevalence of Haemonchus contortus infestation in sheep and caprine animals slaughtered at Mukono butchery in 2012. To cipher the entire sample size, the following parametric quantities will be used: 95 % degree of assurance ( CL ) , 5 % coveted degree of preciseness and with the premise of 50 % expected prevalence of Barber pole worms, the sample size will be determined utilizing the expression given in Thrusfield.

n =1.96 Pexp ( 1-Pexp )


n = required sample size

Pexp = expected prevalence,

vitamin D = desired absolute preciseness

Therefore, based on the above expression the entire figure of sheep and caprine animals will be calculated. ( Sintayehu and Mekonnen. , 2012 )

3.4 Study Methodology

3.4.1 Study animate beings

The survey will be carried out on 400 sheep and grownup caprine animals of four strains from assorted parts of mukono territory. ( Gorski et al. , 2004 )

3.4.2 Post Mortem Examination:

The fourth stomach of slaughtered animate beings which will be selected to be sampled will be inspected for the presence of barber pole worms. ( Sintayehu and Mekonnen. , 2012 )

3.5 Data Analysis:

Percentages to mensurate prevalence and Chi-Square ( x2 ) trial will be employed to mensurate association between the parasitism and species of the animate beings, age, beginning and organic structure status. The worms will be estimated as average figure of worms with several standard divergence of mean and scope ( Maximum- Minimum worm ) in each species. The information will be analyzed utilizing statistical bundles MINTAB package Version 16 and SPSS for Windowss. In all analyses, Confidence degree will be held at 95 % and P & lt ; 0.05 for significance.