from the packets and ma...Fig. 1.99
Dipylidium caninum segments on the surface of a canine fecal sampl...Fig. 1.100
Taenia eggs are brown with a thick shell wall (embryophore) and c...Fig. 1.101 Eggs of
Eucoleus (E),
Toxocara (To), and
Taenia (Ta) and oocysts ...Fig. 1.102 Tapeworm segments from an animal (A) can usually be easily identi...Fig. 1.103 Embryonic hooks are visible in the two
Taenia or
Echinococcus egg...Fig. 1.104
Mesocestoides eggs have a thin, clear, smooth shell wall and cont...Fig. 1.105 Mature tapeworm segments passed in the feces may be observed by o...Fig. 1.106 Within hours of passing from the host, tapeworm segments lose the...Fig. 1.107 Unlike common tapeworms,
Diphyllobothrium eggs lack hooks and res...Fig. 1.108 The operculate eggs of
Spirometra also resemble trematode eggs. T...Fig. 1.109
Alaria eggs are large, operculate, yellow‐brown in color and cont...Fig. 1.110 Sometimes
Alaria spp. eggs are detected using the centrifugal flo...Fig. 1.111
Paragonimus eggs have an undifferentiated embryo when passed in t...Fig. 1.112 The operculated eggs of
Nanophyetus contain an undifferentiated e...Fig. 1.113 The large, elliptical eggs of
Heterobilharzia americana have a sm...Fig. 1.114 On contact with freshwater,
H. americana eggs hatch, releasing a ...Fig. 1.115 The small brown eggs of
Platynosomum have an operculum at one end...Fig. 1.116
Platynosomum (arrow) and
Trichuris eggs in the feces of a cat. Bo...Fig. 1.117
Cryptocotyle lingua egg detected on fecal sedimentation of feces ...Fig. 1.118
Metorchis is another genus of flukes present in wild animals that...Fig. 1.119 Large eggs of
Linguatula may be seen in dogs in North America wit...Fig. 1.120
Macracanthorhynchus ingens eggs. Acanthocephalan eggs contain a l...Fig. 1.121 Parasites found in bovine feces.Fig. 1.122 Parasites found in feces of sheep and goats.Fig. 1.123 Ruminants and camelids are infected with a variety of
Eimeria spp...Fig. 1.124 Bovine
Eimeria oocysts (relative sizes not accurate; see Table 1....Fig. 1.125 Small ruminants are infected with a variety of coccidia species, ...Fig. 1.126 The oocyst shown here is
E. ninakohlyakimovae from a goat. A simi...Fig. 1.127 Many, but not all,
Eimeria species have a cap that covers the mic...Fig. 1.128 In this bovine fecal sample, several fully sporulated
Eimeria ooc...Fig. 1.129
Eimeria llamae (A) and the smaller
E. punonensis (B) are coccidia...Fig. 1.130 New World camelids are also infected with two species of
Eimeria ...Fig. 1.131 The small oocysts of
Cryptosporidium are best seen using the high...Fig. 1.132
Cryptosporidium oocysts can also be detected in acid fast‐stained...Fig. 1.133 This calf fecal sample contains a larvated
Strongyloides egg (S) ...Fig. 1.134 Cyst of
Buxtonella sulcata. These cysts may be seen in bovine fec...Fig. 1.135 The strongylid (also referred to as strongyle or trichostrongyle)...Fig. 1.136 Once strongylid eggs are exposed to oxygen and adequate temperatu...Fig. 1.137 Egg of
Nematodirus sp. This is one of the few strongylid eggs of ...Fig. 1.138 Ovine fecal sample containing strongylid eggs (S), and a
Nematodi...Fig. 1.139
Strongyloides eggs may be confused with strongylid eggs. The two ...Fig. 1.140
Trichuris eggs are common in ruminant feces. They have a thick, b...Fig. 1.141 This bipolar
Aonchotheca (
Capillaria) egg can be confused with
Tr...Fig. 1.142 Ruminant fecal sample containing both
Trichuris (T) and
Aonchothe...Fig. 1.143 Camelids can be infected with
Aonchotheca sp. but are also parasi...Fig. 1.144
Toxocara vitulorum eggs have the thick shell typical of ascarids....Fig. 1.145
Skrjabinema (Sk), the ruminant pinworm. Pinworm eggs often appear...Fig. 1.146 Iodine‐stained
Muellerius larva.Fig. 1.147
Muellerius larvae can be easily identified by the presence of a k...Fig. 1.148
Parelaphostrongylus, a parasite of white‐tailed deer, produces fi...Fig. 1.149
Protostrongylus larvae have a plain tail without the kink and acc...Fig. 1.150 Higher magnification view of the simple tail of a
ProtostrongylusFig. 1.151
Dictyocaulus viviparus first‐stage larva. Intestinal cells contai...Fig. 1.152 Although
Dictyocaulus larvae are most often seen in fecal samples...Fig. 1.153 Eggs of
Moniezia are often square or triangular, unlike the more ...Fig. 1.154 Owners may be alarmed by the presence of
Moniezia segments in the...Fig. 1.155 Packet of
Thysanosoma eggs from a sheep. The eggs lack the pyrifo...Fig. 1.156
Fasciola hepatica egg. These large eggs have an operculum (
arrow)...Fig. 1.157
Fasciola hepatica (F) and
Paramphistomum (P) eggs. The two eggs a...Fig. 1.158 Egg of
Fascioloides magna, the liver fluke of white‐tailed deer. ...Fig. 1.159
Dicrocoelium dendriticum eggs contain a fully formed miracidium, ...Fig. 1.160 The eggs of
Eurytrema are similar in appearance to those of
Dicro...Fig. 1.161 Ruminant schistosomes typically produce a spindle‐shaped egg. Thi...Fig. 1.162 Parasites found in fecal samples of horses. Figure courtesy of Dr...Fig. 1.163 The large size and deep‐brown color of the oocysts of
E. leuckart...Fig. 1.164 Fecal flotation test containing iodine‐stained
Giardia cysts.Fig. 1.165
Cryptosporidium oocysts in a sugar flotation preparation.Fig. 1.166 Equine strongylid (strongyle) eggs in fresh fecal samples are typ...Fig. 1.167 Several equine strongylid eggs are present in this fecal sample. ...Fig. 1.168 Equine small strongyle larvae (
arrows) in manure. These small (le...Fig. 1.169
Parascaris eggs are typical, thick‐shelled ascarid eggs containin...Fig. 1.170
Parascaris eggs may lose the rough, proteinaceous coat on the egg...Fig. 1.171 Larvated strongylid egg and
Parascaris egg that has undergone the...Fig. 1.172 Egg of
Strongyloides westeri, the horse threadworm. These eggs ar...Fig. 1.173
Oxyuris eggs are asymmetrical with a single polar plug. Eggs embr...Fig. 1.174 Adult pinworms are occasionally seen in the feces of horses. Adul...Fig. 1.175 Larvated egg of
Habronema sp. The larva is surrounded by a thin s...Fig. 1.176 The only parasitic nematode larvae that would be expected in the ...Fig. 1.177 Larvae of
Dictyocaulus arnfieldi, the equid lungworm, have a smal...Fig. 1.178 The egg of the equine tapeworm
Anoplocephala is similar in appear...Fig. 1.179
Anoplocephala egg (A) and several equine strongylid eggs.Fig. 1.180 Parasites found in fecal samples of pigs.Fig. 1.181 Unsporulated (A) and sporulated (B) oocyst of
Cystoisospora suis....Fig. 1.182 Oocysts of
E. porci (P) and
E. scabra (S), two of the eight
Eimer...Fig. 1.183 Numerous
Eimeria oocyts in a porcine fecal sample. Although commo...Fig. 1.184
Balantidium coli trophozoite in a direct saline smear. The cilia ...Fig. 1.185 The kidney‐bean‐shaped macronucleus, characteristic of ciliates, ...Fig. 1.186 Hyperosmotic flotation solutions can cause distortion of
Balantid...Fig. 1.187 Like other ascarid eggs, those of
Ascaris suum contain a single c...Fig. 1.188
Hyostrongylus and
Oesophagostomum are the most common and importa...Fig. 1.189 Like other members of the genus, eggs of
Trichuris suis, the swin...Fig. 1.190 Larvated
Strongyloides eggs are usually present only in the feces...Fig. 1.191 The small
Strongyloides ransomi egg (Sr) pictured here could be c...Fig. 1.192 In fresh fecal samples,
Metastrongylus eggs contain a larva and h...Fig. 1.193 Egg of
Physocephalus.Fig. 1.194
Ascarops egg. Spirurid eggs are unlikely to be seen if standard f...Fig. 1.195
Fasciola eggs. Trematode infections are rarely encountered in swi...Fig. 1.196
Macracanthorhynchus hirudinaceus egg. The embryo (acanthor) is su...Fig. 1.197
Eimeria spp. oocysts from a chicken.
Eimeria species are common p...Fig. 1.198 After reaching the environment,
Eimeria oocysts sporulate; the le...Fig. 1.199
Isospora spp. can also be found in birds, as seen in this fecal s...Fig. 1.200
Caryospora oocyst. The sporulated oocyst of this genus contains a...Fig. 1.201
Sarcocystis is another coccidia genus that may be found in the fe...Fig. 1.202
Cryptosporidium spp. oocysts in birds are similar in appearance t...Fig. 1.203
Trichomonas spp. in birds have an undulating membrane and several...Fig. 1.204
Chilomastix is a genus of intestinal flagellate found in birds, p...Fig. 1.205 Eggs of
Capillaria spp. are very common in the feces of domestic ...Fig. 1.206 Egg of
Eucoleus dispar from a sharp‐shinned hawk.Fig. 1.207
Capillaria sp. egg in an owl (
arrow). The larger, browner egg bel...Fig. 1.208 A smooth, thick shell is seen in both
Ascaridia spp. and
Heteraki...Fig. 1.209 Another ascarid genus found in ducks and wild birds is
PorrocecumFig. 1.210
Subulura brumpti eggs in the feces of a chicken. Unlike most asca...Fig. 1.211 Strongylid egg and coccidia oocysts in an avian fecal sample.Fig. 1.212
Syngamus sp. egg from a crow. This is a common parasite of wild b...Fig. 1.213 Like
Syngamus, eggs of
Capillaria and
Eucoleus spp. have bipolar ...Fig. 1.214 Spirurid egg in the feces of a double‐crested cormorant. Larvae a...Fig. 1.215 Spirurid egg in the feces of a red‐tailed hawk. The larva within ...Fig. 1.216
Tetrameres egg in the feces of a homing pigeon. Like other
